Develop Bugs

Error browsing the internet with GPRS

I recently bought a new HTC s620(EXCA 100) phone with Windows Mobile 5.0. I have subscribed for internet thru a local GPRS carrier, everything works fine except my internet access. Initially everytime i access a web site (using IE) it works for about 4 mins max then gives a time out. It has worsened with time now i only browse for 30 secs and it times out.
I have tried:
An alternative browser (Skyfire) and this as well times out from time to time, so i have eliminated that the browser has the fault. My common sites are m.facebook.com and mobile.yahoo.com, which are secure site, but i even get the issue with non-secure sites.
A hard reset on the phone which has proved futile in rectifying the problem.
Reconfiguring the internet settings with my GPRS provider
I have also tried my sim card in another phone, this sim card worked to browse online with no issues. Then after hooked my phone onto my PC at work and browsed via the company’s LAN, I had no problem there either.
I can only conclude that my phone has the problem.
The errors I constantly get are:
- Alert..The page cannot be displayed or downloaded because the connection was lost. Check the connection and try again later.
- Error.. Cannot connect. Verify you have network coverage and try again.
Thanx in advance… awaiting ur assistance.

Yatus said:
I recently bought a new HTC s620(EXCA 100) phone with Windows Mobile 5.0. I have subscribed for internet thru a local GPRS carrier, everything works fine except my internet access. Initially everytime i access a web site (using IE) it works for about 4 mins max then gives a time out. It has worsened with time now i only browse for 30 secs and it times out.
I have tried:
An alternative browser (Skyfire) and this as well times out from time to time, so i have eliminated that the browser has the fault. My common sites are m.facebook.com and mobile.yahoo.com, which are secure site, but i even get the issue with non-secure sites.
A hard reset on the phone which has proved futile in rectifying the problem.
Reconfiguring the internet settings with my GPRS provider
I have also tried my sim card in another phone, this sim card worked to browse online with no issues. Then after hooked my phone onto my PC at work and browsed via the company’s LAN, I had no problem there either.
I can only conclude that my phone has the problem.
The errors I constantly get are:
- Alert..The page cannot be displayed or downloaded because the connection was lost. Check the connection and try again later.
- Error.. Cannot connect. Verify you have network coverage and try again.
Thanx in advance… awaiting ur assistance.
Click to expand...
Click to collapse
You can try to update your rom to a more recent version.

Having the same problem here...
My Dash just started having the dame problem recently. And it's driving me bananas! I have tried everything EXCEPT flashing the Rom. I"m trying to not have to flash the Rom because it's always a major pain in the ass to do it...i always get the 3% error and get stuck in the loop of all the fixes, which without fail, DON'T work.
Anyway, does anyone have a work around for this that doesn't require flashing the Rom?

I had the same problem too with my Dash. What I did was go to my service provider's website and copy the settings for my phone. By default, using the Connection Setup of the Dash would configure the GPRS as it were inserted a postpaid SIM. Since I am on a prepaid service SIM, I had to manually change some of the access points (example: from www to http) as instructed by my provider's website. After that I had no problems connecting through either Internet Explorer or Opera Mini 5.

Millwork322 said:
My Dash just started having the dame problem recently. And it's driving me bananas! I have tried everything EXCEPT flashing the Rom. I"m trying to not have to flash the Rom because it's always a major pain in the ass to do it...i always get the 3% error and get stuck in the loop of all the fixes, which without fail, DON'T work.
Anyway, does anyone have a work around for this that doesn't require flashing the Rom?
Click to expand...
Click to collapse
You shouldn't have any problem with flashing if you follow correctly the instructions error 270/3% while flashing

[Q] Cell Signal/Network Registration Loss

My problem in short: Cell signal loss
More info: It started in late November pretty suddenly. One day I was no longer getting the 2-3 bars of 4G reception I had always been getting at work, at my desk. I would either get the ‘No Service’ symbol or 1-2 bars with no E/G/4G/LTE symbol next to the bars, which (I believe) signifies I’m registered to the network and communicating with it. For the first week or two I thought maybe they were working on the tower(s) in the area and I just needed to wait it out. After 2 weeks I started searching the XDA forums for people with similar problems but didn’t see anyone with symptoms exactly like mine. I did go get a new SIM Card form an AT&T store and called CS to activate it but that changed nothing. So I’ll put all my symptoms out and hopefully one of you glorious devs can layout my best course of action House M.D. style.
Device: Samsung Galaxy Note II (SGH-i317)
Network: AT&T
Purchase Date: Nov 18, 2012 (out of warranty)
Baseband ver: I317UCUBMK6
Kernel ver: 3.0.31-2048209, [email protected] #1, Tue Nov 19 16:46:45 KST 2013
Build Number: JSS15J.I317UCUBMK6
SE for Android status: Enforcing, SEPF_SAMSUNG-SGH-I317_4.3_0010
IMEI/IMEISV: Both numbers are whole and match the inside sticker.
OS History: Completely stock until early Dec 2013 when I was on 4.1.2 and rooted using Odin/CWM Recovery about 2 weeks after my problems started b/c I was gonna try some of the things I read on XDA (SELinux to Passive, RIF/Modem, Repartition, ect)but before I had the chance I saw the 4.3 OTA Update was out and thought “This should at least reflash/update my modem and hopefully fix it”. NOPE, I lost root with 4.3. So now I’m on 4.3 Stock OTA and the only reason I haven’t re-rooted is because I know I’ll trip KNOX which even though I’m out of warranty already, whining to AT&T that their 4.3OTA screwed up my phone maybe still an option if any of you guys suggest it as my best option (but they could more easily refute my claim if I trip KNOX). I’ve also tried at least 5 different APN settings which made little or no difference.
Additional Symptoms:
- The problem is more a “degradation” (worsening) of the signal than a complete loss, meaning in areas where my signal was previously ‘weak’ I now get the ‘no service’ symbol OR 1-2 bars without Network Registration which still gives me the “Emergency Calls Only” message. But in areas where I usually had near perfect reception (5 bars 4GLTE) I now get usually 1-2 bars less.
- There are times at work (usually when I’m one of the last ones on the floor) when my signal will fluctuate to a 3-4 bar 4G connection for a few minutes and then back down to ‘No Service’.(Which indicated to me that it isn’t a bad antenna since a good reception IS possible and the problem is likely software related.) Also my cubicle mate a has an AT&T iPhone 5 that consistently gets 3 bars of 4G and his phone is 5ft away from mine.
- If I go to About Device>Status and watch my ‘Signal Strength’ without moving my phone it will fluctuate from -95dBm 7asu to -113dBm 0 asu.
- I’ve made a successful call(although it took forever to connect the call and start ringing, as if it were struggling) while my signal was -105dBm and 5asu with “Mobile Network Type: Unknown” “Service State: In Service” “Mobile Network State: Disconnected” with one bar of service but w/o any type of connection type designator next to the bars(E/G/4G/etc).
- Sometimes when I leave work or someplace that I have had poor/no connection and get closer to a cell tower, my signal bars will go as high as 5 bars but my phone still won’t make a call or show a connection type designator (4G/LTE/Etc.) next to the bars and gives me the “Emergency Calls Only” message until I either restart the phone or wait.
- When I’m at home and connected to my WiFi my phone seems to make no attempt to stay connected to the Cell Network even though I have 4-5 bars of service it shows no type of 4G/LTE connection unless I turn off WiFi.
- I should say that I use an app that takes frequent screenshots which are stored on the phone’s storage until I erase them. (up to 300-500 @ about 1MB each) I’ve read pushing/pulling lots of data to/from your device’s storage can cause partition problems and I imagine creating/deleting large amounts of data as I’m doing could have the same effect.
- Also if I’m sent a voicemail while without service I still won’t immediately get it when I my phone regains a decent connection and have gotten voicemails up to 2 hrs after they were left.
From what I’ve read on the forums so far I have seen the following options but would like a recommendation on what to do and what order to do them in. (I have no worries about tripping KNOX if it means getting the phones cell reception back to normal. I’ve had the phone >1yr anyway.)
- Root (which method?)
- Unlock bootloader
- RIF (Radio/Modem Reflash?)
- Re-partition the device storage
- Set SELinux to Passive
- Enable AWS (T-mobile 3g/4g)
- Install Custom ROM (suggestions?)
- EFS file something or other
Thanks in advance and I’ve included a few screenshots of the About Device>Status screen.

kodiak0385 said:
My problem in short: Cell signal loss
More info: It started in late November pretty suddenly. One day I was no longer getting the 2-3 bars of 4G reception I had always been getting at work, at my desk. I would either get the ‘No Service’ symbol or 1-2 bars with no E/G/4G/LTE symbol next to the bars, which (I believe) signifies I’m registered to the network and communicating with it. For the first week or two I thought maybe they were working on the tower(s) in the area and I just needed to wait it out. After 2 weeks I started searching the XDA forums for people with similar problems but didn’t see anyone with symptoms exactly like mine. I did go get a new SIM Card form an AT&T store and called CS to activate it but that changed nothing. So I’ll put all my symptoms out and hopefully one of you glorious devs can layout my best course of action House M.D. style.
Device: Samsung Galaxy Note II (SGH-i317)
Network: AT&T
Purchase Date: Nov 18, 2012 (out of warranty)
Baseband ver: I317UCUBMK6
Kernel ver: 3.0.31-2048209, [email protected] #1, Tue Nov 19 16:46:45 KST 2013
Build Number: JSS15J.I317UCUBMK6
SE for Android status: Enforcing, SEPF_SAMSUNG-SGH-I317_4.3_0010
IMEI/IMEISV: Both numbers are whole and match the inside sticker.
OS History: Completely stock until early Dec 2013 when I was on 4.1.2 and rooted using Odin/CWM Recovery about 2 weeks after my problems started b/c I was gonna try some of the things I read on XDA (SELinux to Passive, RIF/Modem, Repartition, ect)but before I had the chance I saw the 4.3 OTA Update was out and thought “This should at least reflash/update my modem and hopefully fix it”. NOPE, I lost root with 4.3. So now I’m on 4.3 Stock OTA and the only reason I haven’t re-rooted is because I know I’ll trip KNOX which even though I’m out of warranty already, whining to AT&T that their 4.3OTA screwed up my phone maybe still an option if any of you guys suggest it as my best option (but they could more easily refute my claim if I trip KNOX). I’ve also tried at least 5 different APN settings which made little or no difference.
Additional Symptoms:
- The problem is more a “degradation” (worsening) of the signal than a complete loss, meaning in areas where my signal was previously ‘weak’ I now get the ‘no service’ symbol OR 1-2 bars without Network Registration which still gives me the “Emergency Calls Only” message. But in areas where I usually had near perfect reception (5 bars 4GLTE) I now get usually 1-2 bars less.
- There are times at work (usually when I’m one of the last ones on the floor) when my signal will fluctuate to a 3-4 bar 4G connection for a few minutes and then back down to ‘No Service’.(Which indicated to me that it isn’t a bad antenna since a good reception IS possible and the problem is likely software related.) Also my cubicle mate a has an AT&T iPhone 5 that consistently gets 3 bars of 4G and his phone is 5ft away from mine.
- If I go to About Device>Status and watch my ‘Signal Strength’ without moving my phone it will fluctuate from -95dBm 7asu to -113dBm 0 asu.
- I’ve made a successful call(although it took forever to connect the call and start ringing, as if it were struggling) while my signal was -105dBm and 5asu with “Mobile Network Type: Unknown” “Service State: In Service” “Mobile Network State: Disconnected” with one bar of service but w/o any type of connection type designator next to the bars(E/G/4G/etc).
- Sometimes when I leave work or someplace that I have had poor/no connection and get closer to a cell tower, my signal bars will go as high as 5 bars but my phone still won’t make a call or show a connection type designator (4G/LTE/Etc.) next to the bars and gives me the “Emergency Calls Only” message until I either restart the phone or wait.
- When I’m at home and connected to my WiFi my phone seems to make no attempt to stay connected to the Cell Network even though I have 4-5 bars of service it shows no type of 4G/LTE connection unless I turn off WiFi.
- I should say that I use an app that takes frequent screenshots which are stored on the phone’s storage until I erase them. (up to 300-500 @ about 1MB each) I’ve read pushing/pulling lots of data to/from your device’s storage can cause partition problems and I imagine creating/deleting large amounts of data as I’m doing could have the same effect.
- Also if I’m sent a voicemail while without service I still won’t immediately get it when I my phone regains a decent connection and have gotten voicemails up to 2 hrs after they were left.
From what I’ve read on the forums so far I have seen the following options but would like a recommendation on what to do and what order to do them in. (I have no worries about tripping KNOX if it means getting the phones cell reception back to normal. I’ve had the phone >1yr anyway.)
- Root (which method?)
- Unlock bootloader
- RIF (Radio/Modem Reflash?)
- Re-partition the device storage
- Set SELinux to Passive
- Enable AWS (T-mobile 3g/4g)
- Install Custom ROM (suggestions?)
- EFS file something or other
Thanks in advance and I’ve included a few screenshots of the About Device>Status screen.
Click to expand...
Click to collapse
Very impressive. A model for future help. :good:
- Root (which method?)
*[HOWTO] [SGH-I317/M] CF-Auto-Root v1.0....developed by Chainfire*
http://forum.xda-developers.com/showthread.php?t=1980644
**** No need to try yet.
- Unlock bootloader
Not an option, it is not available
- RIF (Radio/Modem Reflash?)
#1 to try
http://d-h.st/WTp
CWM AT&T i317 UCUBMK6 Stock *Modem* Note 2
Need custom recovery to flash.
INSTALLING TWRP 2.6.3.1
- Run Odin3 v3.07.exe
Download Link http://www.mediafire.com/download/772dlmuaxfgm0x2/Odin307.zip
- Put your Note 2 in Download Mode
Entering download mode is very simple. First you will need to turn off your device. Once it’s off, you need to press this button combination: volume down, power button and home button. Keep them pressed until the download mode shows up. Once you’re there, you will be required to press volume up to enter the download mode or volume down to cancel and reboot the device.
Plug into a RELIABLE usb port and a RELIABLE usb cable (preferably the white Samsung cable) and wait for it to show up in Odin (COM5 or something like that)
- Click the PDA slot in Odin and locate the openrecovery-twrp-2.6.3.1-t0lteatt.img.tar that you downloaded.
The filename that goes into the PDA Slot is openrecovery-twrp-2.6.3.1-t0lteatt.img.tar
MAKE SURE IN THE OPTION AREA ONLY AUTO REBOOT AND F.RESET TIME ARE CHECKED!!!
- Click START and wait. It will complete and reboot.
- Re-partition the device storage
Extreme at this point
- Set SELinux to Passive
This will keep Knox quiet after rooting.
No need at this time
- Enable AWS (T-mobile 3g/4g)
You're on ATT correct ????
- Install Custom ROM (suggestions?)
Many choices. Depends what you are looking for
- EFS file something or other
Another extreme option. Hold off
Give modem flash a shot.
Here's another thing to check
http://forum.xda-developers.com/showthread.php?t=2172110

dicksteele said:
Very impressive. A model for future help. :good:
- Root (which method?)
*[HOWTO] [SGH-I317/M] CF-Auto-Root v1.0....developed by Chainfire*
http://forum.xda-developers.com/showthread.php?t=1980644
**** No need to try yet.
- Unlock bootloader
Not an option, it is not available
- RIF (Radio/Modem Reflash?)
#1 to try
http://d-h.st/WTp
CWM AT&T i317 UCUBMK6 Stock *Modem* Note 2
Need custom recovery to flash.
INSTALLING TWRP 2.6.3.1
- Run Odin3 v3.07.exe
Download Link http://www.mediafire.com/download/772dlmuaxfgm0x2/Odin307.zip
- Put your Note 2 in Download Mode
Entering download mode is very simple. First you will need to turn off your device. Once it’s off, you need to press this button combination: volume down, power button and home button. Keep them pressed until the download mode shows up. Once you’re there, you will be required to press volume up to enter the download mode or volume down to cancel and reboot the device.
Plug into a RELIABLE usb port and a RELIABLE usb cable (preferably the white Samsung cable) and wait for it to show up in Odin (COM5 or something like that)
- Click the PDA slot in Odin and locate the openrecovery-twrp-2.6.3.1-t0lteatt.img.tar that you downloaded.
The filename that goes into the PDA Slot is openrecovery-twrp-2.6.3.1-t0lteatt.img.tar
MAKE SURE IN THE OPTION AREA ONLY AUTO REBOOT AND F.RESET TIME ARE CHECKED!!!
- Click START and wait. It will complete and reboot.
- Re-partition the device storage
Extreme at this point
- Set SELinux to Passive
This will keep Knox quiet after rooting.
No need at this time
- Enable AWS (T-mobile 3g/4g)
You're on ATT correct ????
- Install Custom ROM (suggestions?)
Many choices. Depends what you are looking for
- EFS file something or other
Another extreme option. Hold off
Give modem flash a shot.
Here's another thing to check
http://forum.xda-developers.com/showthread.php?t=2172110
Click to expand...
Click to collapse
__________________________________________________________________________________________________
Thank you for your quick response and sorry I've taken so long to come back.
So I installed TWRP per the instructions and installed the app as well. When i tried to use TWRP to flash/install the .zip package for the modem using TWRP it either doesnt work or is interupted by the phone booting into CWM Recovery. I also atempted to flash using CWM Recovery and the "install from external" option but it the process ends in an error as follows:
Finding update package...
Opening update package...
Verifying update package...
E:signature verification failed
Installation aborted
So as my phone sits now, I have both Busybox and SuperUser apps installed. Both TWRP AND CWM Recovery installed (should i get rid of something? so they aren't 'stepping on each other',and how would i do that. And im pretty sure i tripped KNOX somewhere along the way b/c it's reading as 1(I was out of warranty anyway).
I'm willing to do anything and everything to this phone if it gets my modem/radio working 100% again.
Also, what is the best method/app/storage location to create a fail safe/backup in case i brick my phone somewhere along the way due to my inexperience?
Thanks in advance.

kodiak0385 said:
__________________________________________________________________________________________________
Thank you for your quick response and sorry I've taken so long to come back.
So I installed TWRP per the instructions and installed the app as well. When i tried to use TWRP to flash/install the .zip package for the modem using TWRP it either doesnt work or is interupted by the phone booting into CWM Recovery. I also atempted to flash using CWM Recovery and the "install from external" option but it the process ends in an error as follows:
Finding update package...
Opening update package...
Verifying update package...
E:signature verification failed
Installation aborted
So as my phone sits now, I have both Busybox and SuperUser apps installed. Both TWRP AND CWM Recovery installed (should i get rid of something? so they aren't 'stepping on each other',and how would i do that. And im pretty sure i tripped KNOX somewhere along the way b/c it's reading as 1(I was out of warranty anyway).
I'm willing to do anything and everything to this phone if it gets my modem/radio working 100% again.
Also, what is the best method/app/storage location to create a fail safe/backup in case i brick my phone somewhere along the way due to my inexperience?
Thanks in advance.
Click to expand...
Click to collapse
You can only have one installed at a time, either TWRP or CWM. They both install a recovery.img. If you install TWRP, and then install CWM. TWRP gets over written.
Both are good custom recovery. It comes down to personal preference when using it. Both are touch capable.
Both have backup capabilites.
I think TWRP is a good starter. Here's a good guide to review.
http://www.addictivetips.com/android/what-is-twrp-how-to-install-use-it-on-android-devices-guide/
It's an older version but good info. It also shows how to do a backup. It's good to backup to the external SDCARD. That way you can copy the TWRP directory to your PC and save backups "offline".
I have TWRP version 2.6.3.1 installed on my phone. I'm going to try and flash the modem. You may have just gotten a corrupt download.
EDIT: I just flashed that modem zip file through TWRP and it was successful.

So the modem flashed successfully (using TWRP) but the signal didn't improve. If the phone would just stay registered to the cell tower it's getting a signal from that would be a step in the right direction but not only does the signal strength fluctuate, network registration is an issue as well so unless the stars align my phone is useless. So what should i try next? different modem? If I do everything i can to eliminate a sotware problem i have no problem trying to replace the modem/radio/antenna but i've read those parts are hard to find since its a rare hardware problem. TIA

kodiak0385 said:
So the modem flashed successfully (using TWRP) but the signal didn't improve. If the phone would just stay registered to the cell tower it's getting a signal from that would be a step in the right direction but not only does the signal strength fluctuate, network registration is an issue as well so unless the stars align my phone is useless. So what should i try next? different modem? If I do everything i can to eliminate a sotware problem i have no problem trying to replace the modem/radio/antenna but i've read those parts are hard to find since its a rare hardware problem. TIA
Click to expand...
Click to collapse
This is easier than what you've done so far.
Go here. ...
http://forum.xda-developers.com/showthread.php?t=2172110
[How To][Guide] Att Apn List
You're going to add another cell network connection. How to do that is on the top on first post.
The first one is what you should be on. The default.
Try adding in the second one. The LTE. Let's see what that does.
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app

Thanks. I tried all 6 different APN's and no change. I did this before i flashed the modem as well and it didn't make a difference then either. Whats next?
I'm experiencing signal degredation at home now. When the phone was new I always had 5 bars LTE (i must live near a tower) and then when the troubles started in Nov. it went down to 4 bars and now in this past week it been 2-4 bars of just 4G.

kodiak0385 said:
Thanks. I tried all 6 different APN's and no change. I did this before i flashed the modem as well and it didn't make a difference then either. Whats next?
I'm experiencing signal degredation at home now. When the phone was new I always had 5 bars LTE (i must live near a tower) and then when the troubles started in Nov. it went down to 4 bars and now in this past week it been 2-4 bars of just 4G.
Click to expand...
Click to collapse
Running out of options in my head. Try this app and see what network connection is doing. Just ran across is cleaning up my crap.
https://play.google.com/store/apps/details?id=com.cls.networkwidget
I just tried it and but info is over my head. Pretty much.
It's a widget. Pop on home screen. Then press widget. Window pops up and a tab says my network info.
So are you experiencing any issues besides noticing the bars aren't as strong?
Sent from my SAMSUNG-SGH-I317 using XDA Premium 4 mobile app

Here are a couple other apps you can try that may help track down signal quality and external factors (like tower changes in your area):
Network Signal Info - https://play.google.com/store/apps/details?id=de.android.telnet
^^Has a pro version as well with a supposedly better database of cell towers
Open Signal - https://play.google.com/store/apps/details?id=com.staircase3.opensignal
^^Has a map of cell towers as well as a crowdsourced map of coverage quality by carrier

I am experiencing the exact same symptoms mentioned by kodiak0385 but on the Rogers network using the Canadian I317M version. Unless I am well within 1000 feet from a tower my phone wont grab LTE speeds. More than a 3000 feet and I lose all signal whatsoever.
My phone was network unlocked using the service menu 6 months ago with no issues until now. Was using carbon 4.3 Rom for 2 months when the problem began.
Tried flashing all three rogers modems.
Changed APNs.
Reverted to stock Rogers 4.1, 4.2 and now on 4.3 with same problem.
Changed SIM card.
Tried opening up phone to clean antennae contacts with compressed air.
Nothing has worked.
I don't know what else to try before sending it in to a repair shop. Any suggestions?
Thanks in advance!!

I have the same issue as well with cell reception. Everything works great. Data, WiFi, and SMS/MMS. Calls are crap. I have had 4-5 bars and It will dial and stay in the dialing screen for 1 minute and then the signal will dissappear and the phone will just hang up. After it hangs up service is returned. Idk what the heck is going on. It has to be the cell network issue. I tried my sim in a different phone and it works perfectly. Im on Straight Talk. Never had a problem untill the 4.3 update with knox.
Sent from my SAMSUNG-SGH-I317 using xda app-developers app

Help! Verizon Note 4 random network drop...

I apologize in advance for the long read.
I recently activated Verizon service on a Note 4 that has been sitting unused since the Note 8 came out. The Note 4 is in perfect physical condition, with no scratches on the screen or body, and has been in a protective case since new. I did replace the battery in it prior to activation, as I expect for the life to have been deteriorated.
I did a factory reset and inserted my Verizon SIM card, and it worked perfectly. I installed my everyday apps and a few games on the phone, and I used it without any issue for about a week. During that time, it did install a couple of OTA updates, but I expected that since it had been "off service" for a few years.
After that first week, I put the SIM card back in my NOTE 8 for a couple of days, after which I went back to the Note 4. Initially, 4G data and cell service worked, but within the same day I started having service drops. If I was on the phone and a call dropped, it would show an error message saying "No SIM / SIM Error".
Her is what I have attempted so far:
First, I replaced the SIM with a new one. There was difference in the frequency of the random service drop.
When that did nothing, I assumed that one of the OTA updates from the prior week had done something to modem / radio. The phone was on 6.0.1 at that time. I unlocked the bootloader and installed TWRP, and first tried downgrading to stock 5.1.1, then to a "modified 5.1.1, then to CM 13, and now Lineage 15 (frequently factory reset / cache wipe. There has not been an improvement (or reduction) to the random service drop.
Yesterday, I happened to be on My Verizon online, and I had a message showing that Verizon no long had the information on my phone (IMEI), and requesting that I open a Chat Window to update my info. At this point, the Note 4 is still running the Lineage 15.1. The Verizon team member asked me for the IMEI, and when I looked under the settings, it said "None" under IMEI. In a quick search, I found a forum on Lineage 15.1 that said turning of the screen lock and rebooting the phone will reload the SIM and IMEI info. That worked, and I was able to view the IMEI and verify connection. I explained my issue with the Verizon support, and she said everything appeared to be good on her end. Over the course of 15 minutes, we tested my connection and it worked. About 30 minutes after that, it dropped service again.
Finally, here is where it is at now:
I start with no service. If I do nothing but restart the phone, it will show LTE service for 2 or 3 seconds, then nothing. If I remove and reinstall the SIM, I will get the same 2 or 3 seconds, then nothing. If I turn Airplane Mode on and off, that does not reconnect the service. If I change the lock screen security to "None" and restart the phone, there is no service, but if I set Screen Lock to "Swipe" and restart the phone, I will have LTE service for at least 30 - 45 minutes before it drops, sometimes a few hours. When it does drop, it does not come back on it's own. The only way I have found to get it back it to "Screen Lock - None, reboot, Screen Lock - swipe, reboot".
Will replacing the modem fix the problem? Is there a specific modem that I need to match up to the ROM? Thanks!

bife2003 said:
I apologize in advance for the long read.
I recently activated Verizon service on a Note 4 that has been sitting unused since the Note 8 came out. The Note 4 is in perfect physical condition, with no scratches on the screen or body, and has been in a protective case since new. I did replace the battery in it prior to activation, as I expect for the life to have been deteriorated.
I did a factory reset and inserted my Verizon SIM card, and it worked perfectly. I installed my everyday apps and a few games on the phone, and I used it without any issue for about a week. During that time, it did install a couple of OTA updates, but I expected that since it had been "off service" for a few years.
After that first week, I put the SIM card back in my NOTE 8 for a couple of days, after which I went back to the Note 4. Initially, 4G data and cell service worked, but within the same day I started having service drops. If I was on the phone and a call dropped, it would show an error message saying "No SIM / SIM Error".
Her is what I have attempted so far:
First, I replaced the SIM with a new one. There was difference in the frequency of the random service drop.
When that did nothing, I assumed that one of the OTA updates from the prior week had done something to modem / radio. The phone was on 6.0.1 at that time. I unlocked the bootloader and installed TWRP, and first tried downgrading to stock 5.1.1, then to a "modified 5.1.1, then to CM 13, and now Lineage 15 (frequently factory reset / cache wipe. There has not been an improvement (or reduction) to the random service drop.
Yesterday, I happened to be on My Verizon online, and I had a message showing that Verizon no long had the information on my phone (IMEI), and requesting that I open a Chat Window to update my info. At this point, the Note 4 is still running the Lineage 15.1. The Verizon team member asked me for the IMEI, and when I looked under the settings, it said "None" under IMEI. In a quick search, I found a forum on Lineage 15.1 that said turning of the screen lock and rebooting the phone will reload the SIM and IMEI info. That worked, and I was able to view the IMEI and verify connection. I explained my issue with the Verizon support, and she said everything appeared to be good on her end. Over the course of 15 minutes, we tested my connection and it worked. About 30 minutes after that, it dropped service again.
Finally, here is where it is at now:
I start with no service. If I do nothing but restart the phone, it will show LTE service for 2 or 3 seconds, then nothing. If I remove and reinstall the SIM, I will get the same 2 or 3 seconds, then nothing. If I turn Airplane Mode on and off, that does not reconnect the service. If I change the lock screen security to "None" and restart the phone, there is no service, but if I set Screen Lock to "Swipe" and restart the phone, I will have LTE service for at least 30 - 45 minutes before it drops, sometimes a few hours. When it does drop, it does not come back on it's own. The only way I have found to get it back it to "Screen Lock - None, reboot, Screen Lock - swipe, reboot".
Will replacing the modem fix the problem? Is there a specific modem that I need to match up to the ROM? Thanks!
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I think you might be dealing with 2 separate issues. I'm kind of guessing about the first issue but the second is a common problem.
I think the original problem is that your sim card is not making a good contact in the sim slot. You could try putting a think piece of cardboard or something that will press the sim card to the sim slot contacts (maybe check to make sure that there isn't any dirt on the contacts but from the sound of it I'm guessing your phone is pretty clean).
The second problem is that all of the aosp roms have varying degrees of signal loss that occurs. Some people have a lot and some not as much, but everyone is affected in some way with what people have been referring to as "sim death".
My suggestion would be to run a stock or modified stock rom until you get your sim problem straightened out and then if you still want to switch to an aosp rom then at least you'll know that any further problems are just the normal sim death that occurs from time to time with those types of roms.
If you've already updated your bootloader to a 6.0.1 version you can flash the modified stock rom that I put together. I haven't had any signal/sim issues at all with that and no reports of it. Like I mentioned before though, the only caveat is that it needs to be on a bootloader that is at least CPD1 or newer. If it's not then your wifi won't work.
Rom link If you're interested.

kevintm78 said:
I think you might be dealing with 2 separate issues. I'm kind of guessing about the first issue but the second is a common problem.
I think the original problem is that your sim card is not making a good contact in the sim slot. You could try putting a think piece of cardboard or something that will press the sim card to the sim slot contacts (maybe check to make sure that there isn't any dirt on the contacts but from the sound of it I'm guessing your phone is pretty clean).
The second problem is that all of the aosp roms have varying degrees of signal loss that occurs. Some people have a lot and some not as much, but everyone is affected in some way with what people have been referring to as "sim death".
My suggestion would be to run a stock or modified stock rom until you get your sim problem straightened out and then if you still want to switch to an aosp rom then at least you'll know that any further problems are just the normal sim death that occurs from time to time with those types of roms.
If you've already updated your bootloader to a 6.0.1 version you can flash the modified stock rom that I put together. I haven't had any signal/sim issues at all with that and no reports of it. Like I mentioned before though, the only caveat is that it needs to be on a bootloader that is at least CPD1 or newer. If it's not then your wifi won't work.
Rom link If you're interested.
Click to expand...
Click to collapse
Thank you for the reply. I think that you may be onto something with both issues. After posting this question today, I did examine the SIM slot, and although all of the pins looked good, and no dust or debris was visible, the metal guide over the SIM did feel slightly loose from the card. I did put in a thin shim, and the significantly improved the time that the phone stays connected. If that was a true issue, along with the possibility of the ROM causing a separate cause, I am absolutely interested on going back to a stock (or modified stock) ROM. The only reason that I did what I did was an attempt to fix the connectivity issue.
Thanks for your help. I will give your ROM a try and let you know how it works.

SIM card recognized but no service

TL;DR
Moto Z2 Play - XT1710-07
The phone recognizes the SIM card but there is no signal (no service). Tried several things, including flashing a custom ROM. I'm considering buying a new motherboard and changing it myself, but first want to know if anyone knows more about this issue or has an idea/suggestion.
Edit: As an added bonus, something that only now I realized. Now when I charge it, it gets EXTREMELY hot. Like I-can't-even-use-it hot. I used to use the phone while charging all the time, but now I can't even hold it. Seems like the problem is when it tries go past 80% charge. It gets super slow, keeps trying and gets hot. Now I don't know if it's a software problem caused by the various flashings or if it's something that would remain even after swapping the motherboard.
Edit 2: I did a full discharge of the phone and recharged it while turned off. It seems to have normalized the battery problem
Edit 3: RIP. I tried to remove the screen before deciding about buying a new board. In the process, I ended up tearing the digitizer flat cable apart. Now I don't think it's worth it buying both a new screen and a motherboard.
The full story and things I've tried
My phone was working all nice and dandy until it stopped having signal/service. Wifi works normally, but anything related to the SIM card doesn't, like phone calls or mobile data.
A list of things I've tried somewhat in order (both of time and of complexity):
* My SIM in another phone: it works normally, so the problem is not the SIM itself
* Another SIM in my phone: it doesn't work, so the problem is definitely the phone
* Using the second SIM slot
* Changing "Preferred Network Type" between the available ones (4G, 3G, 2G, including Enhanced 4G LTE Mode on and off): this one and the next two items don't really make sense to me, since these options seem to be only related to mobile data (4G/3G internet) connection, not to phone calls which is also not working, but I tried them anyway
* Manually selecting the network: Errors with "Selected network unavailable" and, after trying to register for a while, toasts another error saying "Can't connect to the network, try again later"
* Manually selecting the APN: Tried both selecting between the two options available and manually adding an APN by googling the correct info for my carrier
* Simply booting into fastboot and restarting bootloader: a video on YouTube claimed that it was a temporary solution and that I'd need to do it every time it lost signal. But it didn't even work the first time
* Disabling CQATest and then restarting bootloader (and also clearing its data/cache and removing its permissions): a lot of videos on YouTube claimed this was a solution, including for other Motorola phones. Apparently CQATest prevents the phone from working properly in some scenarios. But I think only when you de-google your phone? Not sure. All I know is that it didn't work either
* Using the phone connected to the wall charger: I think this was another YouTube suggestion, and it actually worked for a few minutes. But I guess it was just a coincidence, as it never worked again
Now for some more... "forceful" attempts:
* Factory Reset: Not sure where I saw this suggestion, but it was pretty much the next logical step. Gathered courage, backed up all my data, etc, aaand... nothing again
* Flashing another ROM: Guess it was here at XDA that I read that it was a problem with Motorola's stock ROM. That, paired with my belief that it could still be related to CQATest being installed, I again gathered more courage to flash a custom ROM. I chose LineageOS and found out that it was no longer supported, but decided to install the last official release. I also read that the problem was the Pie modem firmware, so it all seemed to be going fine since the last official release is Oreo 8.1. I flashed it and BAM it worked! ... for a few minutes and never again. I messed around with LineageOS, tried some of the previous things again, but nothing.
Then, I tried to restore my TWRP backup but it didn't work. So I searched a bit more and downloaded the Stock Pie ROM, flashed it, and closed the bootloader. And then I realized the restore probably didn't work since my backup was made using Pie and my phone was on Oreo. Maybe some files/partitions were missing? Also, when I was creating my TWRP backups, I tried creating a full system image backup but it kept erroring. Only later I realized the problem was that the USB Drive was FAT32 and the full system image was bigger than 4GB. Oh, well, now I know.
So now that I'm with my phone pretty much back on square one, I take it to an authorized repair shop. The clerk said that it was a common problem, and that sometimes it could be solved "by software" and that they'd try that. The other option was to change the whole motherboard, which they didn't do because it was "not worth it" and "almost the full price of a new phone". After two days, my suspicions were confirmed: they didn't fix it with their "by software" attempt. At least I didn't have to pay anything.
When I got the phone back, I put the SIM in again and it showed the icon as if there was signal. But when I tried to call someone, the signal disappeared again. I tried searching a bit more, went through all pages of Q&A here at XDA forums and there were like 3 posts regarding loss of signal. All without any response. On YouTube, I found some videos offering a suspicious .bat file. Upon inspection, it merely erased the modemst1 and modemst2 partitions and then wiped user data and cache. I tried it, nothing to lose. Also didn't work.
Now I'm contemplating a few options:
By watching some disassembly videos, I saw that, when opened, the phone has some parts that act like antennas. I thought that maybe those were not properly connected to the board? Maybe they got dislodged during a fall? Seems unlikely tho, since they are screwed in. I searched for a new motherboard to buy and it's a reasonable price. But I'm afraid it'll have the same problem (or develop it in a short time) since I can't find anywhere what the true cause of the problem is.
Another option is to just give up, buy a new phone and use this one as if it was a "small tablet" lol
So, do you guys have any other suggestions or ideas as to what might be the problem? Maybe a tip like "solder a wire to this spot to create a make-do antenna"? I don't really know where else to search.
If not, thanks anyway for those who read it all

Question Phone reboots a few seconds after loss of mobile data connection?

Hello guys/gals,
I am anything but an Android pro, but generally I know a bit about tech stuff.
This new Redmi Note 8 (ginkgo) is currently driving me crazy, though.
Had bought it specifically due to the LineageOS support, that I was looking for.
However, I am facing a VERY ANNOYING issue with this phone, with both stock OS (MIUI 12.1) and LineageOS 17.1:
Wanted to run the phone with a Vodafone SIM card.
Behavior with LineageOS it is like this:
As soon as the phone loses the mobile data connection, it only takes a few seconds and the phone will reboot. Will do it as long as there is no mobile data connection. Boots up again afterwards, but upon login, it again only takes a few seconds and then it reboots again. Useless this way.
With stock OS, the phone does not reboot, however I see it indefinitely detect SIM ==> loose SIM ==> switch to WLAN ==> drop WLAN ==> detect SIM ==> loose SIM ...
Same again in an endless loop. As a result, the phone is more or less unusable, as it can neither use mobile data, nor WLAN.
ONLY with a stable mobile data connection, this thing seems to run like intended with both stock and Lineage.
Have never seen something like this before!
And the best part:
Also tried two Telekom SIM cards.
No problems whatsoever with the Telekom SIMs, even with no mobile data connection!
If anyone should have insights on what might be happening here, let's hear it.
BTW, already once replaced the Vodafone SIM. No change in behavior.
Thanks to anyone who's willing to help. Certainly much appreciated!
Maybe this problem is already known.
Best regards,
madocer