Develop Bugs

Network Connection Issue - No 3g/4g

OK, I have been dealing with this since I bought my GSII and cannot find any information about it.
Firstly I want to say that I am completely stock and unrooted.
My phone does not like to keep a stable data connection. About 50% of the time, when I try to do anything that requires a data connection (facebook, browser, gmail, etc.) the 2 arrows under the 2g/3g/4g icon will stick being grey and my phone just sits there "loading". I tried a factory reset, didn't install any apps, and also got a new sim card and the issue remains. It happens everywhere so it is not just a bad network connection.
I decided to post the question here because yesterday I was playing with my brother's GSII, and his did the same thing.. So it made me think that maybe it wasn't just me. Has anyone else experienced this? Or does anyone know what might be the cause?
Edit: I set my phone to use 2g only, and the problem vanished.. So it doesn't like to connect to 3g/4g.
Sent from my SGH-T989 using xda premium

Try going to your mobile network connection settings, choose access point names, hit your menu button and click "restore defaults".. It may fix it, I had data issues and it did the job. Hope it works for you!
Sent from my SGH-T989 using Tapatalk

Do what the gut above me said. Also call Tmobile and tell them, they will refresh your data connection on their end. That will clear up three problems your having.
But if it's also happening to your brothers phone, it's a network error. Call Tmobile.
Sent from my SGH-T989 using XDA App

munzik said:
Do what the gut above me said. Also call Tmobile and tell them, they will refresh your data connection on their end. That will clear up three problems your having.
But if it's also happening to your brothers phone, it's a network error. Call Tmobile.
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
I restored the apn settings and had Tmobile refresh my data connection, and it still happens. I noticed today that it's not just data, I'm also unable to call or text when it happens.. Tmobile just said everything tested normal so there is nothing they can do.. And I really don't think it's the phone so I don't want to exchange for a refurbished unless I have to.
Sent from my SGH-T989 using xda premiu

Its happened to me before. For about a week, the data connection just dropped. It would come back for a bit and later vanish. I called t-mobile and they guided me through routine steps (i.e. taking the battery out, rebooting, resetting) but nothing seemed to work. They really couldn't figure it out and later told me to replace the SIM. I can't remember if they shipped me one or had to go to the store but either way that relieved the problem. This was on an HTC HD2.
That might not be the case with you though. At one point in time all the phones under my name lost data connectivity just as you explain. This really had no solution but to wait it out.

Towle said:
I restored the apn settings and had Tmobile refresh my data connection, and it still happens. I noticed today that it's not just data, I'm also unable to call or text when it happens.. Tmobile just said everything tested normal so there is nothing they can do.. And I really don't think it's the phone so I don't want to exchange for a refurbished unless I have to.
Sent from my SGH-T989 using xda premiu
Click to expand...
Click to collapse
Are you paying for teathering?

sgip2000 said:
Are you paying for teathering?
Click to expand...
Click to collapse
No I don't use tethering, my download speeds are too slow where I live.
Sent from my SGH-T989 using xda premium

you mentioned your brother's is doing the same thing, its probably not the phone, but rather the cell tower your connected to is fuggin up. Try going 5 miles from where you currently are and see if its still happening.

Network error
Sent from my SGH-T989 using XDA App

Just in case it's not a cell tower or network problem . . . My SGS2, purchased in October, had the same symptoms as the OP. After trying everything the OP did, and more, I came to the conclusion that the firmware on the phone was corrupt. I used Odin to flash the factory stock ROM & Kernel images (2.3.5 at the time). There was a definite improvement in the faltering/hesitant/fail connectivity problem at that point, but it was still very subpar. So I then also flashed, again using Odin, the baseband ("modem") image - I did it twice for good measure. The problem was finally immediately solved at that point and I had very prompt loading of webpages, etc. Still working fine months later (and even better with a custom ROM). See the thread entitled "[Q]Is there a "true" factory restore for T-Mobile Galaxy S II?" for help about the seemingly same symptoms/problem you (and your brother) are experiencing. If your underlying problem is in fact the same as mine (and the poster of the thread I cited) then it's apparently either a bad factory flash or a post-factory corruption occurrence that is causing your problem . . . the coincidence of your brother also having the same problem aside. Good luck!
Sent from my SGH-T989 (now on GingerSnap v1.21) using XDA App

AT&T Samsung Galaxy S3 SGH-I747 mayor problem

Hello
This is my first post here. Well I rooted my S3 and installed the Rom JellyBam I had some issues with the ROM so I decided to remove the ROM using wipe cache,davlik etc. after that the phone was stuck on Samsung logo so I restored the phone using Samsung Kies firmware restore thing.
All went very well software was working well but the phone has very low signal now and don't want to connect to 3g,4g,lte etc. only sometimes appears the Edge symbol and G but its very slow. So Im worried I have been using this phone for 1 month more or less. I really don't know how to fix it I hope someone can help me. I attached some pictures in case some 1 can see something rare. Thanks

Well, you don't remove a rom simply by wiping. Also when you wipe davlik it can take up to ten (10) minutes to rebuild it. Odin back to stock. Always a good way to fix things.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Check your APN settings and of that's not it check for you IMEI under status. If that's gone there's a thread here to follow to fix it but if you don't wanna go that route and you have insurance take it up to the store and get it exchanged

I feel ya bro, we have major Mayor problems here in Harrisburg, PA too!

dratsablive said:
I feel ya bro, we have major Mayor problems here in Harrisburg, PA too!
Click to expand...
Click to collapse
Your funny would have been really Joke if you hadn't said major.:laugh:

I fixed the imei but the problem was the same, then I flashed the Modem for my model and all worked calls, sms, 4g LTE but only worked for like 1 hour :/.

abimael85 said:
I fixed the imei but the problem was the same, then I flashed the Modem for my model and all worked calls, sms, 4g LTE but only worked for like 1 hour :/.
Click to expand...
Click to collapse
If you're using 4.2 roms, most if not all of them have horrible data issues at least the many I've flashed but that could be because att signal blows...

[Q] [SOLVED (sorta)] Sgs3 i747m Service issues

First of all this is my first time posting here on xda but have read a lot of things on this website, and i apologize if i have placed this in the wrong area.
I have seen other threads about this issue but none seem to be quite like mine.
So i had cyanogenmod on my galaxy s 3 att/rogers, I had it on my phone for a long time pretty much the entire year i have had the phone, when randomly last night my service just stopped. I cant make phone calls, text, or use data. But my wifi still works. so basically my phone turned into a tablet.
Things I have tried to fix this:
1: restored using nanndroid backup (no effect)
2: flash a different rom "PAC Rom" with its kernel (no effect)
3: Restored phone to complete factory defaults using odin (no effect)
4: Tried different SIM card in my phone to see if it would work (no effect)
5: Tried my SIM in different phones (worked)
6: Restored phone to factory default using samsung kies (no effect)
So can you see my delema? No matter what i try the service just will not activate and only says "rogers emergency calls only". this phone is only around a year old.. This isn't a common thing to happen is it?
Anyways I would be very, very happy if anyone could help me fix this problem. I apologize if i get back to you slow as i have to go to work in a couple minutes, my boss is probably going to be pissed I have no phone. :crying:

Nothing? Nothing at all?

I had similar issue I just solved. I had only lost data however. I would suggest maybe checking your apn settings. It maybe flash a modem. I was able to make calls/texts no problem but no data at all. I Google the apn settings and now everything works great
Sent from my SGH-I747 using xda app-developers app

Did you check if your IMEI is still intact?
Your issue sounds very similar to those who have lost their IMEI.
Sent from my SAMSUNG-SGH-I747M using XDA Premium 4 mobile app

musical utamag
Apn settings were all right. Not sure what has happened.. rogers told me the phone was toast but I have a hard time beleiving that from someone who looks at my phone for 30 seconds and says that. Either way I'm picking my note 3 up friday. Not through rogers, since they were a royal pain in my wallet. Bell ftw
Not really sure if I should mark this as solved due to the fact its not?

[DATA][FIX] Process com.android.phone FC Fix

Hey guys. I noticed a lot of people, including myself, have been getting the dreaded process com.android.phone force close message upon booting up new ROMs.
This only happens when trying to connect to data. Turn it off, and the force closes stop. Well, I believe I've found a workaround using an APN file I've found floating around on the Carbon ROM thread!
Upon booting, just keep clicking the OK message to skip past the FC errors and the ROM setup process, and then disable your data as soon as you can. Connect to wifi, go to the Play store and install your favorite root browser. Download the linked APN file at the bottom of this post to your phone, and open up your root browser. Copy the APN file you downloaded, then go to system/etc, delete the stock APN file and replace it with the new one. Set permissions to rw-r-r, reboot into recovery, and do a factory data reset. Boot back into ROM and voila, you should be good!
Note that this may or may not fix your data problems, as every phone is different and some of you are on different carriers. This method has been working for me ever since I started doing it a couple of days ago, and almost every new ROM I've installed recently have given me the FC error. That is no more with this new APN, and I even get a better data connection than before. Hope this helps you all!
Download link: http://www.mediafire.com/?8s937bc91ysgpqe
*****EDIT*****
This method has also fixed my data problems on the new KitKat ROMs as well. Before, I wouldn't even get data on the new KK ROMs, and if I did, 3G would go away and never come back when switching between wifi and data. Replaced the APN, and my data came back stable, even when switching to wifi.
Sent from my LG-LS970 using xda app-developers app

iamterence said:
Hey guys. I noticed a lot of people, including myself, have been getting the dreaded process com.android.phone force close message upon booting up new ROMs.
This only happens when trying to connect to data. Turn it off, and the force closes stop. Well, I believe I've found a workaround using an APN file I've found floating around on the Carbon ROM thread!
Upon booting, just keep clicking the OK message to skip past the FC errors and the ROM setup process, and then disable your data as soon as you can. Connect to wifi, go to the Play store and install your favorite root browser. Download the linked APN file at the bottom of this post to your phone, and open up your root browser. Copy the APN file you downloaded, then go to system/etc, delete the stock APN file and replace it with the new one. Set permissions to rw-r-r, reboot into recovery, and do a factory data reset. Boot back into ROM and voila, you should be good!
Note that this may or may not fix your data problems, as every phone is different and some of you are on different carriers. This method has been working for me ever since I started doing it a couple of days ago, and almost every new ROM I've installed recently have given me the FC error. That is no more with this new APN, and I even get a better data connection than before. Hope this helps you all!
Download link: http://www.mediafire.com/?8s937bc91ysgpqe
*****EDIT*****
This method has also fixed my data problems on the new KitKat ROMs as well. Before, I wouldn't even get data on the new KK ROMs, and if I did, 3G would go away and never come back when switching between wifi and data. Replaced the APN, and my data came back stable, even when switching to wifi.
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
Thanks a Lot !!! Data worked for me on Omni rom !! :laugh:

Sweet! Thanks. Going to give this a shot now. Was so excited for 4.4 but it COMPLETELY disabled ALL my data (wifi/3G/LTE).
Guess it's time to give KitKat another shot.
Abhijeet357 said:
Thanks a Lot !!! Data worked for me on Omni rom !! :laugh:
Click to expand...
Click to collapse

no data "loss" for me on KitKat but 4G drops out when making a call and come right back after I hang up.
anyone else seeing this???

reddragon72 said:
no data "loss" for me on KitKat but 4G drops out when making a call and come right back after I hang up.
anyone else seeing this???
Click to expand...
Click to collapse
Okay, I've been seeing this complaint around the forums recently, so I'll say this.
For as long as I've ever owned a smartphone, 3G/4G ALWAYS turned off for me whenever I was in a phone call, but I could still browse the internet and stuff. Maybe now things are different with this phone/these ROMs, and data is actually blocked when in a call, I don't know. It's not an issue to me, though, because I really don't use data while in a call. So hopefully this issue can get cracked down further for you guys who do.
Sent from my LG-LS970 using XDA Premium 4 mobile app

iamterence said:
Okay, I've been seeing this complaint around the forums recently, so I'll say this.
For as long as I've ever owned a smartphone, 3G/4G ALWAYS turned off for me whenever I was in a phone call, but I could still browse the internet and stuff. Maybe now things are different with this phone/these ROMs, and data is actually blocked when in a call, I don't know. It's not an issue to me, though, because I really don't use data while in a call. So hopefully this issue can get cracked down further for you guys who do.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I can confirm that no matter what ROM I've been on, when I made or received a call, my 4G/3G symbol would disappear, but if I was on 4G I could still access the internet. Not with 3G of course. I'll need to get to a 4G area and test this.

iamterence said:
Okay, I've been seeing this complaint around the forums recently, so I'll say this.
For as long as I've ever owned a smartphone, 3G/4G ALWAYS turned off for me whenever I was in a phone call, but I could still browse the internet and stuff. Maybe now things are different with this phone/these ROMs, and data is actually blocked when in a call, I don't know. It's not an issue to me, though, because I really don't use data while in a call. So hopefully this issue can get cracked down further for you guys who do.
Sent from my LG-LS970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
For CM10.2 it works fine. For stock it is fine it just seems to be this KitKat that is a GSM build that is being worked over a bit for CDMA. That is where the problem lies.
Androidawg said:
I can confirm that no matter what ROM I've been on, when I made or received a call, my 4G/3G symbol would disappear, but if I was on 4G I could still access the internet. Not with 3G of course. I'll need to get to a 4G area and test this.
Click to expand...
Click to collapse
One stock my 4G symbol stays as well as internet. On KK I loose the symbol and no data connection. I always confirm that data is actually gone.

Not sure if you've all seen this but apparently it's going to be fixed soon.
http://forum.xda-developers.com/showthread.php?p=47449131

I tried this on liquid official..I DL APN deleted old one, set permission reboot to twrp wiped data and same thing...was wiping data the wrong thing? Can someone shed some light on this I'm not a noob but one to this phone
Sent from my LG-LS970 using Tapatalk

goast said:
I tried this on liquid official..I DL APN deleted old one, set permission reboot to twrp wiped data and same thing...was wiping data the wrong thing? Can someone shed some light on this I'm not a noob but one to this phone
Sent from my LG-LS970 using Tapatalk
Click to expand...
Click to collapse
Are you on Sprint?
Sent from my LG-LS970 using Tapatalk

iamterence said:
Are you on Sprint?
Sent from my LG-LS970 using Tapatalk
Click to expand...
Click to collapse
Yes
Sent from my LG-LS970 using Tapatalk

goast said:
Yes
Sent from my LG-LS970 using Tapatalk
Click to expand...
Click to collapse
Weird. This has worked for me on every AOSP ROM I've tried, including Liquid Did you paste it in system/etc?
Sent from my LG-LS970 using Tapatalk

Yeah going to try one more time but after I set permission what exactly do I do
Sent from my LG-LS970 using Tapatalk

goast said:
Yeah going to try one more time but after I set permission what exactly do I do
Sent from my LG-LS970 using Tapatalk
Click to expand...
Click to collapse
Paste in system/etc, set permissions to rw-r-r, reboot to recovery, factory data reset, reboot. Worked for me every time.
Sent from my LG-LS970 using Tapatalk

reddragon72 said:
no data "loss" for me on KitKat but 4G drops out when making a call and come right back after I hang up.
anyone else seeing this???
Click to expand...
Click to collapse
I wonder if this has to do with our builds coming from the nexus 5, since it is a tri-band LTE device. It does not have the capability to be connected to LTE and CDMA at the same time. Are there any radio files we are grabbing from the nexus 5 that might be causing this behavior to occur?
Check out this article, it talks about the inability of the tri band devices to be connected to LTE while using voice/text:
http://s4gru.com/index.php?/blog/1/...-due-to-circuit-switched-fallback-technology/

iamterence said:
Hey guys. I noticed a lot of people, including myself, have been getting the dreaded process com.android.phone force close message upon booting up new ROMs.
This only happens when trying to connect to data. Turn it off, and the force closes stop. Well, I believe I've found a workaround using an APN file I've found floating around on the Carbon ROM thread!
Upon booting, just keep clicking the OK message to skip past the FC errors and the ROM setup process, and then disable your data as soon as you can. Connect to wifi, go to the Play store and install your favorite root browser. Download the linked APN file at the bottom of this post to your phone, and open up your root browser. Copy the APN file you downloaded, then go to system/etc, delete the stock APN file and replace it with the new one. Set permissions to rw-r-r, reboot into recovery, and do a factory data reset. Boot back into ROM and voila, you should be good!
Note that this may or may not fix your data problems, as every phone is different and some of you are on different carriers. This method has been working for me ever since I started doing it a couple of days ago, and almost every new ROM I've installed recently have given me the FC error. That is no more with this new APN, and I even get a better data connection than before. Hope this helps you all!
Download link: http://www.mediafire.com/?8s937bc91ysgpqe
*****EDIT*****
This method has also fixed my data problems on the new KitKat ROMs as well. Before, I wouldn't even get data on the new KK ROMs, and if I did, 3G would go away and never come back when switching between wifi and data. Replaced the APN, and my data came back stable, even when switching to wifi.
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
Sorry for belated update, worked like a charm for me.!

Confirmed to work. I did NO factory data reset or even rebooting. FCs just immediately stopped after replacing file. Proof enough for me.
What's the cause of this?

goast said:
Yeah going to try one more time but after I set permission what exactly do I do
Sent from my LG-LS970 using Tapatalk
Click to expand...
Click to collapse
This did not work for me on the AOSP 4.4 ROM either. I have tried several times and still get force closes. I am running fine on CM10.2 though.

Does this fix the issue with switching between 4G to 3G? While on the Omni rom, if I'm connected to 4G and it loses signal, it doesn't connect to 3G. Or, if I want to turn of 4G and only use 3G, it never connects.

For some reason, when I put it, the system just disregards it. It says successfully deleted and pasted too. When I delete the old one and paste the new one it says "Do you want to overwrite?" even though the old one is gone. Anybody got anything?
Sent from my LG-LS970 using xda app-developers app

Getting no signal when calling.

Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.

humritumri said:
Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.
Click to expand...
Click to collapse
More device details please friend. What baseband are you on? NB4? If not, then you need to be on NB4 modem. If so, then it's possibly a kernel related issue I suggest flashing the latest build of Ktoonez kernel for AOSP, be sure to flash the right one for your phone. Example, don't flash the TouchWiz version
Sent from my SGH-M919 using xda app-developers app

Could also be APN settings
Sent from my SGH-M919 using Tapatalk

TSFox0317 said:
Could also be APN settings
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
For sure. I'm on C-Rom and I noticed the default apn settings were a little wacky. So after editing them, I'm running great with signal and of course free unlimited WiFi tether
Sent from my SGH-M919 using XDA Free mobile app

humritumri said:
Hello Everyone,
I am running the Virgin Rom with Ktoonsez.
I have been trying to find out the solution for more than two week but cannot find the solution. I got this strange problem in my phone, When I put my phone idle I get the full lte signal but however when i try to call someone all my signal get disappear but the strange thing is i can still talk to that person without the signal. As soon as i hang up my phone i would get all my signal back, when i get my signal back i can do normal browsing, watch video etc. I mean its no major issue, I was just wondering whether if there is any solution to get any signal bar back.
Click to expand...
Click to collapse
Sounds like it's working as it should! LTE cannot process phone calls so the device switches to 4g or edge depending on your area's reception. after the call is terminated, there is a very short delay, and you're reconnected to LTE (if there is reception for lte where you're at)
The device (depending on your settings) will try LTE, then 4G, then last resort to Edge when it's not on a call and just idling. It will connect when your device wants to access the internet or whatever, and selects the proper frequency (or mode) and use that for the connection..
check Settings/More Networks/Moble networks------ then under Network mode, you will see the connection choice.
if you tap on the network mode, it will give you different connection choices.
If you want LTE, you have only one choice and it downgrades itself as required as explained above.
you can save battery power by going to a lower frequency (like GSM only - which is edge Edge)
hope this helps you understand!
Aloha!

I want to flash the NB4 modem since im having the conection and do know how to use odin, just curious how to flash the modem as a .rar, I thought it had to be a .tar. so I felt it would be better to ask first before I brick my phone. I used the download for "Insane kit kat" I even unzipped it to find it still in .rar format

JORDVN said:
For sure. I'm on C-Rom and I noticed the default apn settings were a little wacky. So after editing them, I'm running great with signal and of course free unlimited WiFi tether
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
How do I know what APN settings I should have?
Or if they are wacky?
Is there a guide?
Pp.
sent from my bluetooth controlled toaster that also takes pictures.

robandcathy said:
I want to flash the NB4 modem since im having the conection and do know how to use odin, just curious how to flash the modem as a .rar, I thought it had to be a .tar. so I felt it would be better to ask first before I brick my phone. I used the download for "Insane kit kat" I even unzipped it to find it still in .rar format
Click to expand...
Click to collapse
If you properly unzipped it and placed it in the phone slot of your odin program, you should be fine. Most people fail with either unzipping or placing it into the correct slot which in this case is the phone slot and not the PDA that you would use for a lot of other functions.
Sent from my SGH-M919 using XDA Free mobile app
---------- Post added at 09:54 AM ---------- Previous post was at 09:53 AM ----------
PanchoPlanet said:
How do I know what APN settings I should have?
Or if they are wacky?
Is there a guide?
Pp.
sent from my bluetooth controlled toaster that also takes pictures.
Click to expand...
Click to collapse
If you're running on T-Mobile, you should only see tmobile APN options available. Take a screenshot of all the available options that you have
Sent from my SGH-M919 using XDA Free mobile app

JORDVN said:
If you're running on T-Mobile, you should only see tmobile APN options available. Take a screenshot of all the available options that you have
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
This is what I have.
Pp.
sent from my bluetooth controlled toaster that also takes pictures.