Develop Bugs

[Q] G2 won't connect to cell network after unlocking

I unlocked my G2 before leaving on trip to Europe and after the unlock process has finished phone now can't connect to gsm network at all. I used 3 different sim cards including t-mobile original sim card nothing helps. Also did hard reset and reflashed with OOB ROM from dev thread, nothing helps. Anybody has the same issue? Any other suggestions?

hmfic said:
I unlocked my G2 before leaving on trip to Europe and after the unlock process has finished phone now can't connect to gsm network at all. I used 3 different sim cards including t-mobile original sim card nothing helps. Also did hard reset and reflashed with OOB ROM from dev thread, nothing helps. Anybody has the same issue? Any other suggestions?
Click to expand...
Click to collapse
Dear friend, my issue exactly. No connection after unlocking. I have tried virtualy anything (different sims, firmware reinstallation, reboots, reset ) nothing happens. As far as i can tell after unlocking the phone cannot read properly no sim at all. It behaves asz a phone whith no sim in it. Try open your phone with no sim and try search for networks. You will get the same error message. I have contacted HTC and awaiting an answer. Where did you found the unlock code?

After you entered the unlock code, you got a pop up message saying something to the effect of "Unlock code successfully entered, rebooting device." Did the device instantly reboot for you or did it take a while? I'm curious as my device just sat there for five minutes before rebooting.
Edit: I should note that I cannot test my device with my foreign SIMs right now, but my T-Mobile connection is working fine post-unlock. Also, it might help to read through this thread. More anecdotal experiences with G2 on other networks in there.

Doesn't work period, the T-Mobile sim card doesn't work either anymore.

jashsu said:
After you entered the unlock code, you got a pop up message saying something to the effect of "Unlock code successfully entered, rebooting device." Did the device instantly reboot for you or did it take a while? I'm curious as my device just sat there for five minutes before rebooting.
Edit: I should note that I cannot test my device with my foreign SIMs right now, but my T-Mobile connection is working fine post-unlock. Also, it might help to read through this thread. More anecdotal experiences with G2 on other networks in there.
Click to expand...
Click to collapse
The device took about 1 minute or so to reboot. And after that not even the original TMo card is working. Where did u get your unlock codes?

gpou said:
The device took about 1 minute or so to reboot. And after that not even the original TMo card is working. Where did u get your unlock codes?
Click to expand...
Click to collapse
I didn't mention because I assumed that as long as it works (meaning the popup said the unlock was successfully entered) then it doesn't matter what the source was. I got my code from T-Mobile, who in turn requests the codes from HTC.
I unlocked by inserting a friend's AT&T sim. Strangely, the device didn't give me the unlock dialog at all when I inserted a Chunghwa Telecom (Taiwan) sim. It couldn't register to any networks when my CHT sim was inserted. However, I did not have a "no sim inserted" error in my notification bar, so it's not the same as your situation, I think.

I have tried every solution i can think with no results. I just hope it isn't a hardware fault a it is very difficult for me to return the phone to T-mobile and get a new one

jashsu said:
I didn't mention because I assumed that as long as it works (meaning the popup said the unlock was successfully entered) then it doesn't matter what the source was. I got my code from T-Mobile, who in turn requests the codes from HTC.
I unlocked by inserting a friend's AT&T sim. Strangely, the device didn't give me the unlock dialog at all when I inserted a Chunghwa Telecom (Taiwan) sim. It couldn't register to any networks when my CHT sim was inserted. However, I did not have a "no sim inserted" error in my notification bar, so it's not the same as your situation, I think.
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Click to collapse
Its the same. I dont get a no sim error. Sim is found. But network search is dead

Try looking up the APN settings for your network and enter them under Wireless and Networks under settings. I had a similar problem with AT&T when I first unlocked. I had signal but no data.

We get no GSM signal whatsoever. Just shows the "x" next to the cellphone signal. Also getting to *#*#4636#*#* menu shows that both CID and LOC fields are unknown. I also tried to do the sim lock from the recovery menu (press volume down with power key) and it gave me errors as some files are missing, so I'm guessing the unlock did happen but it didn't write something somewhere.

hmfic said:
We get no GSM signal whatsoever. Just shows the "x" next to the cellphone signal. Also getting to *#*#4636#*#* menu shows that both CID and LOC fields are unknown. I also tried to do the sim lock from the recovery menu (press volume down with power key) and it gave me errors as some files are missing, so I'm guessing the unlock did happen but it didn't write something somewhere.
Click to expand...
Click to collapse
Excactly my friend. It cannot read properly the sim properties so it cannot find MCC/MNC and CID of our networks. The error you get in SIMLOCK IS
MCCMNC FILE MISSING
CID FILE MISSING
And another thing i noticed. In a properly working android phone when you create a new apn the MCC and MNC fields are automaticaly filled. But in our case they are blank...

rburg45 said:
Try looking up the APN settings for your network and enter them under Wireless and Networks under settings. I had a similar problem with AT&T when I first unlocked. I had signal but no data.
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Click to collapse
Your problem isn't similar at all. These guys can't get signal or data. Network scan turns up nothing.

jashsu said:
Your problem isn't similar at all. These guys can't get signal or data. Network scan turns up nothing.
Click to expand...
Click to collapse
To be exact network search returns an ERROR.

Yeah my bad, didn't realize their problem was so severe. :/

I have a similar problem except mine is temporary. When I unlock the phone I have no connection. Shows an X on the tray. Try enabling airplane mode and disabling it and still the same. I have to reboot the phone in order for it to connect again. It's only happened twice so far, but was annoying. Hope it doesn't get worse.
I am still using the old SIM card from my Cliq, which was in my Sidekick before that. If it happens one more time I'm going to install the new SIM that came with the phone and see if that helps.
Edit:
Nevermind... My phone is not unlocked. I read the post wrong.

Unfortunately no solution yet. I have read here that an OTA is rolling out. Let's hope it could something when received

How you plan on getting OTA if our phones are not even connected to the cellnetwork??? Just leave it on with wifi???

wifi or someone will post a download link.
So far pleople with the same problem as us are increasing.

D/RILJ ( 5176): [0085]> QUERY_AVAILABLE_NETWORKS
D/HTC_RIL ( 1350): ril_func_get_avail_networks():called
D/HTC_RIL ( 1350): (t=1286918594)>> AT+COPS=?\r
D/HTC_RIL ( 1350): (t=1286918594)<< +CME ERROR: 30\r
D/RILJ ( 5176): [0085]< QUERY_AVAILABLE_NETWORKS error: com.android.internal.telephony.CommandException: G
ENERIC_FAILURE
This is the error through logcat for RADIO

Having the same issue
I noticed in addition that there is a difference i the SIM-lock is enabled or not.
When it is not enabled the "SIM error" icon does not appear and the radio symbol is an "x"
When it is enabled I am asked for the PIN at boot and after I enter it the "SIM error" icon is also shown.
So at least the phone seams to be still reading the SIM but that's about it.

No Service Selected network (AT&T) unavailable! No Signal

I flashed in JB AOKP was working fine all of last night. I also entered my SIM Pin or unlock code. The first time I put in an 8 digit unlock code I have. Second time it prompted me I skipped it. I'm pretty sure it was the security pin and not the network unlock. I don't have any other phone's micro SIM I can insert into my phone and a local phone store's T Mobile SIM produced no different of a result except for replacing AT&T with T-Mobile (I have not however put my microSIM into another phone...because I don't have another micro sim phone). Reboot phone this morning and it's no longer working. Tried to enable 2g. Nothing. Tried a battery pull with the phone on, pulling the SIM (same message with SIM pulled out),
Wifi works
This sucks big time ;(
Note: I am pretty sure I did not network lock the phone or anything because the SIM prompt that came up when I flashed JB did not ask me for my unlock or network code (I would have known). The first time I entered that code was 'just in case it's asking me to unlock" but why would it ask me a second time then? So I doubt it was prompting me for a network unlock code. The prompt from youtube videos was different too.
Also APN is empty, but I think that's becasue I'm not connected to any network
Pressing Available networks brings up AT&T AT&T AT&T T-Mobile T-Mobile "311660" pressing any of them you get a quick window connect "too fast" goes back to/stays in available networks screen and says "Can't connect to this network right now. Try again later."
So I added the AOKP and Corresponding kernel yesterday and I mean it was working fine with 4g... apparently this thread says that you need to flash a new radio in some cases when you change kernels?
http://miuiandroid.com/community/threads/no-service-galaxy-s.6529/page-2

zetsui said:
I flashed in JB AOKP was working fine all of last night. I also entered my SIM Pin or unlock code. The first time I put in an 8 digit unlock code I have. Second time it prompted me I skipped it. I'm pretty sure it was the security pin and not the network unlock. I don't have any other phone's micro SIM I can insert into my phone and a local phone store's T Mobile SIM produced no different of a result except for replacing AT&T with T-Mobile (I have not however put my microSIM into another phone...because I don't have another micro sim phone). Reboot phone this morning and it's no longer working. Tried to enable 2g. Nothing. Tried a battery pull with the phone on, pulling the SIM (same message with SIM pulled out),
Wifi works
This sucks big time ;(
Note: I am pretty sure I did not network lock the phone or anything because the SIM prompt that came up when I flashed JB did not ask me for my unlock or network code (I would have known). The first time I entered that code was 'just in case it's asking me to unlock" but why would it ask me a second time then? So I doubt it was prompting me for a network unlock code. The prompt from youtube videos was different too.
Also APN is empty, but I think that's becasue I'm not connected to any network
Pressing Available networks brings up AT&T AT&T AT&T T-Mobile T-Mobile "311660" pressing any of them you get a quick window connect "too fast" goes back to/stays in available networks screen and says "Can't connect to this network right now. Try again later."
Click to expand...
Click to collapse
Pardon my newbness if I'm way off base, but lost IMEI? sounds like the same symptoms I was getting a couple days ago when I flashed CM10.

Kostazu said:
Pardon my newbness if I'm way off base, but lost IMEI? sounds like the same symptoms I was getting a couple days ago when I flashed CM10.
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Click to collapse
...what are you talking about. My IMEI isn't mentioned once in that post. In fact now that you mention it, since people's IMEI changed...nothing like that my phone still has its IMEI
I also did not get a "phone frozen" from entering the wrong code too many times...so I doubt its locked like that. There was a random reboot that I WOKE UP to, but nothing weird...it rebooted randomly but worked finely after that

zetsui said:
...what are you talking about. My IMEI isn't mentioned once in that post. In fact now that you mention it, since people's IMEI changed...nothing like that my phone still has its IMEI
I also did not get a "phone frozen" from entering the wrong code too many times...so I doubt its locked like that. There was a random reboot that I WOKE UP to, but nothing weird...it rebooted randomly but worked finely after that
Click to expand...
Click to collapse
I was proposing the theory that you may have lost your IMEI, since the symptoms you report were very similar to what I was experiencing when I lost mine, however since you still have yours, must be something else, eh?

Kostazu said:
I was proposing the theory that you may have lost your IMEI, since the symptoms you report were very similar to what I was experiencing when I lost mine, however since you still have yours, must be something else, eh?
Click to expand...
Click to collapse
Just flashed an old version of the same rom...still nothing, although this version had 4g lte working for sure gonna try one more flash of the same rom with only some system settings moved around.. I actually need this phone to travel to Europe ;( ffs worst time
Kostazu what was the fix for you?
Ok just flashed Nostalgia which is the stock rom minus bloatware and I get No SIM Insert SIM card (it is in) and when I try to make a call "not registered on network"

zetsui said:
Just flashed an old version of the same rom...still nothing, although this version had 4g lte working for sure gonna try one more flash of the same rom with only some system settings moved around.. I actually need this phone to travel to Europe ;( ffs worst time
Kostazu what was the fix for you?
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Click to collapse
Well, mine was definitely due to a lost imei that happened sometime when flashing.
I did get the network unlock warning thingy twice, and then had no cellular connectivity, which is why I mentioned the lost imei. I restored my nandroid back to stock, then used the method here with a little driver tapdancing to reinject my imei, and that solved my issues, but sounds like you have something else going on.
http://forum.xda-developers.com/showthread.php?t=1801997

If I flash back to stock and no longer have the stock kernel, what is the steps for flashing back then?
1. flash stock kernel
2 fix partitions
3. factory rest/cache/davlik
reboot into oden and flash new image?

Long story short, Don't cut your own microsd..the sim pins on this phone are VERY sensitive and hard to fix/see. Don't bend em.

I am having the same problems right now, I keep on getting " NO SERVICE" - SELECTED NETWORK UNAVAILABLE" Error.
Rebooting doesnt help, flashing modem through CWM doesnt help. I know for a fact that the simcard it good because other apps that I install can read the sim with no problem, and my WIFI is working like a charm.
Someone got a solution for this? This is already like 4 days ongoing, please any help will be appreciated !!

Im having the same no service selected network issue. I can search and find att and the mobile but when I try to have it connect to att that's the error I get. I have an att SIM card in the phone. Sph l720 SIM unlocked, it didn't ask me for an unlock code or anything like that but I also don't get the invalid SIM card error. I've added the main apn from the att website but that doesn't help and the phone is current set to gsm/umts. If anyone has a fix please let me know, thank you.

No Network Sim card

Hi, I buyed the One Plus 3, but when it arrived i see that it need an nano Sim card, proceed to cut my old card and insert on OP3, the card don't show network signal, i thinked it was from being cut, so i proceed to buy a new card, i inserted the new card and nothing no signal, it detects the carrier ID but never get's network signal, if i manualy search networks it don't any carrier, I Tried with anothers Sim cards and no one can't get signal on OP3.
All the cards are working on my before One Plus One, i tried factory reset, i contacted the provider and the problem is not with the sim card.
Is there anyway to share the modem or something like that so i can fix this?, i even try twrp recovery, and flash the original Oxygen Signed zip.

Thats really strange ! Did you try putting the SIM in Slot-2 as well ?

shrijith1 said:
Thats really strange ! Did you try putting the SIM in Slot-2 as well ?
Click to expand...
Click to collapse
Yes i did, i did even tried and custom rom and nothing , tomorrow it gonna get shipped for RMA.

[Solved] IMEI showing as Unknown - No service

Hi everyone.
Recently I have had some issues where sim cards are not working on my phone. At first I thought it was an issue with the sim cards but when I tried the sim in a different phone, it worked fine. I tried numerous restarts, taking the sim out and placing it back in (in case there was an issue with the contacts/sim tray) but this has not solved the issue. By chance I was looking at the phone identity menu and noticed that the IMEI and the IMEI SV fields both say unknown but the device serial number is fine.
I restarted the phone into download mode and checked the System info menu and IMEI number is displayed there but for some reason it is missing in the actual android OS hence I cant connect to the mobile network to make calls etc.
This all started recent after I had come back from abroad (had been using a foreign sim) and tried to use my UK sim. Up until that point, the phone worked fine with the UK and foreign sim. After inserting my UK sim, there was no signal. I got home and tried the sim in my other phone and it worked fine.
I have not modified the phone in anyway (other than flashing an official RUU to fix a boot loop issue - see here ) and it is boot locked and not rooted. After fixing the bootloop issue, I have applied all available OTAs that my phone detected automatically which upgraded the android version to 7.0 (OS 4.28.401.3).
I have tried factory resetting using the menu (not recovery mode) and this has not solved the issue. Any ideas as to how I can fix this IMEI issue?
Many thanks
Rob

Have you checked the apn settings are correct?. Have you checked other UK sim cards in your device that are known to be working?. Do you use a simcard adapter?.

shivadow said:
Have you checked the apn settings are correct?. Have you checked other UK sim cards in your device that are known to be working?. Do you use a simcard adapter?.
Click to expand...
Click to collapse
Yep.. tried other simcards thats work in other phones but they wernt working on my phone.. most likely due to the missing IMEI. I also noticed that the colour of the icons on the pulldown tray were red instead of blue and the phone was sluggish when toggling wifi on and off or entering/leaving Airplane mode.
I managed to fix the issue in the end by downloading an RRU and flashing it from SD card. Everything works ok now.
Thanks for your contribution :good:

shimozu said:
Yep.. tried other simcards thats work in other phones but they wernt working on my phone.. most likely due to the missing IMEI. I also noticed that the colour of the icons on the pulldown tray were red instead of blue and the phone was sluggish when toggling wifi on and off or entering/leaving Airplane mode.
I managed to fix the issue in the end by downloading an RRU and flashing it from SD card. Everything works ok now.
Thanks for your contribution :good:
Click to expand...
Click to collapse
Hi friend, I am actually facing the same problem. can you please guide to the link of the RRU you have used to resolve the problem.
Thanks in advance.

Question Z Fold 3 constantly reboots

Hello, guys
first sorry for my bad english
I will try to describe my problem
so my fold 3 keeps rebooting, but only when I'm not using it, only when it's locked and nothing is running in the background. So far, the only way it works is to turn on the app from the local radio and the volume to 0 ☺☺☺ so it has to work in the background and if I put it on pause it reboots... please help
I tried everything I found on the internet:
- put official android 13
- factory reset
- after factory reset, tried without installing new apps
- battery device care > auto reset OFF
- deleted wipe cache
- safe mode > reset anyway
- test using Samsung Members > everything ok
I have no more ideas

try these:
remove sim card and see if reboots
plug in charger and see if reboots
put in the fridge and see if reboots
let me know if it worked

AndrOmega said:
try these:
remove sim card and see if reboots
plug in charger and see if reboots
put in the fridge and see if reboots
let me know if it worked
Click to expand...
Click to collapse
I remove sim and it works fine 4h now.... so how can i fix it? What's problem?
And Thank You AndrOmega

dmd_domi said:
I remove sim and it works fine 4h now.... so how can i fix it? What's problem?
And Thank You AndrOmega
Click to expand...
Click to collapse
Still no reboot?

_GRIZZLY_ said:
Still no reboot?
Click to expand...
Click to collapse
Yes still no reboot... i put back sim after 10min reboot

dmd_domi said:
Yes still no reboot... i put back sim after 10min reboot
Click to expand...
Click to collapse
So looking problem with your sim card. Are you can put other sim card?
In second sim slot too reboots?

_GRIZZLY_ said:
So looking problem with your sim card. Are you can put other sim card?
In second sim slot too reboots?
Click to expand...
Click to collapse
i already tried the sim2 slot and same problem it reboots
tomorrow I will try with another sim card
on Monday I will go to the operator to get a new sim (unfortunately, my operator does not have an eSim - that would solve the problem)

_GRIZZLY_ said:
So looking problem with your sim card. Are you can put other sim card?
In second sim slot too reboots?
Click to expand...
Click to collapse
So i put wife sim old sim butt same operater and it reboots after 3min
I will try sim with different operater

ok so i have news
i try with different sim new one from tcom and same problem. after 5min it reboot himself
i go to my operater for new sim same problem it restarts
then i got mad and do factory reset butt this time without logging on google account or Samsung acc
and now it past 2h and he didn't restart
please guys help !!!!! don't know what to do

So after that, restarts with only insert sim card to device even new one for me looking like unfortunetly hardware issue and need send to service.
Esim in my opinion didn't resolve problem or only in half because device will be full working especially with sim card which enables fundamental function of phone like connectivity.