Network Unlock on a D852 - G3 Q&A, Help & Troubleshooting

Hey there,
I am having some issues with unlocking my D852. The phone is locked to Rogers, and I'm trying to get it over to Telus. I'm in the stock ROM, with the Telus Sim card in it, everything appears to go smoothly after I enter the unlock code. To verify I go into 2945#*852# and check all the menus, the phone is not personalized, and I'm successfully connected to the Telus network. Afterwards I try to restore from a backup, CloudySix, the phone boots. In the status bar its saying that my SIM Card is Perso Locked, and is prompting me for a SIM Network Unlock PIN. I tried entering a few codes, NCK and SIMCK without any luck. I dont want to enter any more codes in case I lock myself out completely.
I have unlocked before, its been a few years, but I have never run into this. Shouldn't the phone be unlocked permanently, no matter what ROM you flash. Maybe I have to flash a new ROM from scratch? I tried restoring CandySIX CM13 edition and the new AOSP based so far.
***EDIT: I forgot to mention, I reverted back to stock, and I get a prompt for the unlock code again.
I just got a Galaxy S6 from Telus and I'm really not happy with it, it feels like a downgrade to me. Hoping you guys can help me out

When you restore your backup are you restoring the EFS partition as well? I think that is where the unlock is stored (at least that's how it is on some phones).

eradicator006 said:
When you restore your backup are you restoring the EFS partition as well? I think that is where the unlock is stored (at least that's how it is on some phones).
Click to expand...
Click to collapse
Yeah, I was doing a full restore, EFS and Modem. I tried flashing a ROM from scratch just now and that worked for me. The only problem after that was that my WIFI wasn't working afterwards. I might have to continue messing around with it, making progress though!
Thanks for the help

bean72 said:
Yeah, I was doing a full restore, EFS and Modem. I tried flashing a ROM from scratch just now and that worked for me. The only problem after that was that my WIFI wasn't working afterwards. I might have to continue messing around with it, making progress though!
Thanks for the help
Click to expand...
Click to collapse
yeah i think you relocked it

KronicSkillz said:
yeah i think you relocked it
Click to expand...
Click to collapse
Got it all up and running, after an hour of troubleshooting I discovered that the WIFI wasn't working because the AP needed a reboot lol. Through all this though, I discovered the importance of the EFS partition, it stores alot more than your unlock data, its best not to touch it

How were you able to unlock the network sim.

Related

[Q] No signal after flashing Miui

Hi Guys, I am having a weird problem that needs your help. I have been using my unlocked Nitro HD (P930) with the official stable CM9 rom. After hearing all the goods of miui, i gave it a try (with full wipe, data/factory reset, cache partition, and Dalvik Cache). After flashing it, the first thing that poped out said the network is locked and the page for sim unlock was shown. I thought the miui might re-lock my sim so I entered my unlock code. Then it said, "andorid.com has stopped". All i could do is to forget the unlock and went on to the miui home screen. After that my phone cannot pick up any signal at all. I used nano backup to restore my original CM9, everything seemed to work fine but it just couldn't pick up any signal. I went to mobile network settings to select the netwrok operators, it failed everytime. I tried entering 2945#*930# in dialer, it only said "Mobile network not available".
I tried to flash the same miui or my CM9 rom again, but my phone still couldn't pick up any signal.
Thanks if anyone can help.
hk_chiang said:
Hi Guys, I am having a weird problem that needs your help. I have been using my unlocked Nitro HD (P930) with the official stable CM9 rom. After hearing all the goods of miui, i gave it a try (with full wipe, data/factory reset, cache partition, and Dalvik Cache). After flashing it, the first thing that poped out said the network is locked and the page for sim unlock was shown. I thought the miui might re-lock my sim so I entered my unlock code. Then it said, "andorid.com has stopped". All i could do is to forget the unlock and went on to the miui home screen. After that my phone cannot pick up any signal at all. I used nano backup to restore my original CM9, everything seemed to work fine but it just couldn't pick up any signal. I went to mobile network settings to select the netwrok operators, it failed everytime. I tried entering 2945#*930# in dialer, it only said "Mobile network not available".
I tried to flash the same miui or my CM9 rom again, but my phone still couldn't pick up any signal.
Thanks if anyone can help.
Click to expand...
Click to collapse
Have you checked your APN settings?
you may need to reflash another baseband as CWM doesn't backup baseband so your phone failed even after restoring. I think you can find the cwm-flashable baseband on the forum.
lordcheeto03 said:
Have you checked your APN settings?
Click to expand...
Click to collapse
I set and save the APN but the APNs page remains blank after I have entered things like PROXY, MCC, etc.
arda99 said:
you may need to reflash another baseband as CWM doesn't backup baseband so your phone failed even after restoring. I think you can find the cwm-flashable baseband on the forum.
Click to expand...
Click to collapse
Thanks for the reply. I found Drumist's threat about those CWM flashable baseband. I tried the v10j and the v10f, but none of them work. Sorry for asking this dumb question but what should I do next?
hk_chiang said:
Thanks for the reply. I found Drumist's threat about those CWM flashable baseband. I tried the v10j and the v10f, but none of them work. Sorry for asking this dumb question but what should I do next?
Click to expand...
Click to collapse
Someone else commented before about their phone re-locking itself without explanation. The solution was just to unlock it again. I'm assuming you still have the unlock code?
The problem is that custom ROMs are incapable of unlocking the phone. You have to return to a stock ROM to perform the unlock, after which you can then return to a custom ROM. The stock ROM can be a CWM-flashable version for convenience.
drumist said:
Someone else commented before about their phone re-locking itself without explanation. The solution was just to unlock it again. I'm assuming you still have the unlock code?
The problem is that custom ROMs are incapable of unlocking the phone. You have to return to a stock ROM to perform the unlock, after which you can then return to a custom ROM. The stock ROM can be a CWM-flashable version for convenience.
Click to expand...
Click to collapse
You are absolutely right! I flashed back to stock and do the sim unlock again. Now everything is back to normal!!!
This topic is interesting and this can happen to every one. My phone is unlocked too .
I have two questions !!?
1.what 2945#*930 do ?
2. Every time i wana flash a new rom via cwm i dont wipe dalvik cash , what dose it do ? Is it important ?
Sent from my LG-Nitro HD using Tapatalk 2
nss007 said:
This topic is interesting and this can happen to every one. My phone is unlocked too .
I have two questions !!?
1.what 2945#*930 do ?
2. Every time i wana flash a new rom via cwm i dont wipe dalvik cash , what dose it do ? Is it important ?
Sent from my LG-Nitro HD using Tapatalk 2
Click to expand...
Click to collapse
1. 2945#30# is to bring up the sim lock page, where you can enter your unlock code. But it seems to me it doesn't work when your phone is already unlocked or you have a custom rom (just like what Drumist said)
2. I wiped it every time I flash a new rom just to make sure my phone is complete "clean", but I have no idea what it does :silly:
NO signal from the operator network
Hi everybody,
I have an unlocked LG NITRO HD - AT&T, I flashed MIUI rom, after finishing it did not open the phone!!
Then I flashed CM10, but the phone did not get any signal from the operator network :crying:, I changed the sim card with another operator but the problem still there!!!!
Can you help me ?
hng2000 said:
Hi everybody,
I have an unlocked LG NITRO HD - AT&T, I flashed MIUI rom, after finishing it did not open the phone!!
Then I flashed CM10, but the phone did not get any signal from the operator network :crying:, I changed the sim card with another operator but the problem still there!!!!
Can you help me ?
Click to expand...
Click to collapse
Seems you are having the same problem as I do. Simply flash back to stock rom and then enter the sim unlock code again, then your phone should be back to normal.

[Q]EFS Backup

Hello all
My ATT glider recently experiences frozen screen and Ive heard of reflashing the stock ICS rom may figure this out
The phone was bought from ebay and is now being unlocked on 4.0.4(not sure if its legit unlocked)
But I learnt flashing rom may possibly lead to re-locked of the phone
And found solutions about backing up the EFS files could retrive IMEI and unlocked status (correct me if im wrong)
Not sure which solution to go with
1. spocky12's GalaxSim Unlock here
2. EFS Tool (http://forum.xda-developers.com/showthread.php?t=2019540)
3. EFS Pro here
please advice
funhk said:
Hello all
My ATT glider recently experiences frozen screen and Ive heard of reflashing the stock ICS rom may figure this out
The phone was bought from ebay and is now being unlocked on 4.0.4(not sure if its legit unlocked)
But I learnt flashing rom may possibly lead to re-locked of the phone
And found solutions about backing up the EFS files could retrive IMEI and unlocked status (correct me if im wrong)
Not sure which solution to go with
1. spocky12's GalaxSim Unlock here
2. EFS Tool (http://forum.xda-developers.com/showthread.php?t=2019540)
3. EFS Pro here
please advice
Click to expand...
Click to collapse
firstly, what are the first few numbers of the imei in about phone ?
Are they the same as the imei sticker inside the battery cover ? .. That is step 1.
If yes, then backup your EFS not using a tool but with ADB. There's a tutorial you can find that will explain how, its the most certain way to back it up.
then, once you have it saved and emailed and archived to your gmail account, google drive drop box.. whatever ... and clearly renamed to WORKING-EFS-GLIDE-(date).zip THEN start flashing.
funhk said:
Hello all
My ATT glider recently experiences frozen screen and Ive heard of reflashing the stock ICS rom may figure this out
The phone was bought from ebay and is now being unlocked on 4.0.4(not sure if its legit unlocked)
But I learnt flashing rom may possibly lead to re-locked of the phone
And found solutions about backing up the EFS files could retrive IMEI and unlocked status (correct me if im wrong)
Not sure which solution to go with
1. spocky12's GalaxSim Unlock here
2. EFS Tool (http://forum.xda-developers.com/showthread.php?t=2019540)
3. EFS Pro here
please advice
Click to expand...
Click to collapse
I'm running the PA rom and GalaxSim 2.0.2 worked for me. It's not in the market anymore, but the apk I found worked when I paid for the unlock (after a reboot, that is). I've only had to use it once, but it seems like it'll work as many times as you need it without having to pay again.
There is a thread discussing this at length - http://forum.xda-developers.com/showthread.php?t=2019540

Uncusseful Network unlock with cm12.1 and MJB Bootloader... Is there a way?

So here's my problem. I finally got my code to unlock my network on my Canadian rogers phone but I've realized that I need stock rom to be able to unlock and I am now on Cyanogenmod 12.1 android 5.1.1 with the I747MUMUEND3 baseband and MJB bootloader (I believe). I remember flashing a new baseband/modem to be able to get the CM 12.1 nightlies.
But now I'm stuck in France with a SIM card that doesn't work and I don't think I can downgrade from what I'm seeing in the forums. Once your beyong 4.3 there seem no downgrading/stock possibilities...
Am I stuck with a Galaxy S3 wifi tablet?!
You can flash the latest 4.4.2 stock ROM from sammobile.com, perform a factory wipe, boot phone with non-Rogers sim, enter the sim unlock code.
audit13 said:
You can flash the latest 4.4.2 stock ROM from sammobile.com, perform a factory wipe, boot phone with non-Rogers sim, enter the sim unlock code.
Click to expand...
Click to collapse
Sorry to ask you but I can't seem to find it. I've been searching and I found firmware
http://www.sammobile.com/firmwares/download/9102/I747UCDLK3_I747ATTDLK3_XXX/ but
I feel like that might not be it... And I'm scared to brick my phone!
The Rogers s3 is the Sgh-i747m.
And this gets it down to just the i747M releases by Rogers.
http://www.sammobile.com/firmwares/database/SGH-I747M/RWC/
dawgdoc said:
And this gets it down to just the i747M releases by Rogers.
http://www.sammobile.com/firmwares/database/SGH-I747M/RWC/
Click to expand...
Click to collapse
Unfortunately I'm now stuck on boot...
Nevermind I had to factory wipe wich I did and now I have successfully unlocked my phone. Thanks a bunch guys. Much appreciated!
So, I was given a i747 A T & T model for my daughter. I was able to get TWRP flashed and made a back up of the stock ROM. I then proceeded to flash CM12.1. Now, my question is this; I got the unlock code from the original owner and was trying to use it but it kept coming back as an incorrect code. I found this thread and realized I need the stock ROM. So if I restore the stock ROM back up, will that be enough to let the unlock code work? Unfortunately, I've already used 4 of the 5 tries, and don't want to waste the last one. Thanks for any information.
You should be fine to enter the code if you are able to restore the TWRP backup of the stock ROM.
audit13 said:
You should be fine to enter the code if you are able to restore the TWRP backup of the stock ROM.
Click to expand...
Click to collapse
Thanks. That's what I was thinking, but I wanted to run it by you folks here. I'd never dealt with Sim unlocking a phone before. My personal phone was purchased Sim unlocked and my next phone will be a Nexus device so the whole Sim unlocking is new territory.
Sent from my Moto G XT1034 using Tapatalk
Good luck. We're all here to help each other out. Let us know how it goes.
audit13 said:
Good luck. We're all here to help each other out. Let us know how it goes.
Click to expand...
Click to collapse
It worked great! I restored the original stock ROM backup I'd made in TWRP and then performed the unlock and it worked. I'm glad too, since it was the 5th try out of 5 tries. I'm now restoring the backup of the CM12.1 that I'd made for her last night and she's got an active phone. Thanks a lot for the confirmation.
No problem. Congratulations?

I317m sim relocked after flashing 6.0.1

The problem was resolved after flashing stock, reunlock, then restore. I will report if problems comeback.
Hello,
My phone was unlocked (not sure how, bought it second hand years ago) and used it fine on 4.4 custom rom. Ive updated it onthursday to the revolution 6.0.1 (with 3.0.2 twrp, nano open gappsa) and used it fine without problems on thursday.
However, yesterday, it lost cell signal and would not reconnect. So i rebooted the phone and now it is asking me to put sim unlock pin. What is the best course of action to get unlocked 6.0.1? I couldn't find an unlock method for 6.0.1. Should i backup rom, go back to 4.4, unlock, then restore?
Thank you.
It's asking for the sim pin or network unlock pin?
audit13 said:
It's asking for the sim pin or network unlock pin?
Click to expand...
Click to collapse
SIM Network unlock pin. My modem/bootloader is I317MVLBMA3. Do you think i can safely load a 4.1.1 rom and unlock again?
If i install phone info+ and look under secret codes, it does list the code for unlocking, but if i click on it, it gives me a blank page titled "service mode" but doesn't do anything (none of the three methods of entering work under the app). Probably because it is not stock ROM?
I tried searching for stock I317MVLALJ2 ROM to downgrade easily, but it seems like the link is down. I guess ill have to use ODIN.
EDIT:
Can I use TWRP to flash http://stockroms.net/file/GalaxyNote2/SGH-I317M/I317MVLALJ2_I317MOYAALJ2_RWC.zip stock ROM? Or do I have to use ODIN? I am assuming I can as it is a zip rather than img, and as long as I flash recovery right after flashing rom, I shouldn't lose recovery either?
Thank you.
The easiest way would be to flash a stock 4.1.1 rom in Odin. I am fairly certain you can downgrade as I think I downgraded from 4.3 or 4.4.2 on a Koodo note 2 so I could use it on Rogers. If it's not possible to downgrade, Odin will stop.
audit13 said:
The easiest way would be to flash a stock 4.1.1 rom in Odin. I am fairly certain you can downgrade as I think I downgraded from 4.3 or 4.4.2 on a Koodo note 2 so I could use it on Rogers. If it's not possible to downgrade, Odin will stop.
Click to expand...
Click to collapse
Thank you for the reply. I am currently on 6.0.1, but since modem is 4.4.2 ish, i hope that's okay. I will try ODIN. The zip i mentioned above is not a TWRP flashable zip, so I guess I have to use ODIN. The thing that worries me, though, is the fact that I cannot get to the recovery mode from off. I press and hold the volume up-power- home combo, but it keeps on resetting without entering TWRP. The only way for me to enter recovery right now is using a custom rom restart menu. If I go to stock ROM, I won't be able to access the recovery .
EDIT: If I let go of the power button at a certain time while booting, it seems to go into recovery just fine.. The problem is, that timing is tricky.
For flashing a stock rom, you need download mode so don't worry about getting into recovery.
To enter stock recovery, power off and try holding power, volume up, and home. Once the phone boots, let go of power but keep holding home and volume up until you see the dead android, then let go of all buttons.
audit13 said:
For flashing a stock rom, you need download mode so don't worry about getting into recovery.
To enter stock recovery, power off and try holding power, volume up, and home. Once the phone boots, let go of power but keep holding home and volume up until you see the dead android, then let go of all buttons.
Click to expand...
Click to collapse
Thank you. Flashed stock using ODIN, rebooted, showed samsung logo with music (stock boot animation), then the phone is stuck on SAMSUNG logo changing colors. Stuck there for the last 10 minutes... Not sure where to go from here ..
Boot into recovery and do a factory wipe.
audit13 said:
Boot into recovery and do a factory wipe.
Click to expand...
Click to collapse
Success. Thank you very much. So I've done the factory reset and successfully rebooted the phone. Then applied the unlock method, which seemed to have worked. Does not ask for SIM unlock pin. However, it does not seem to actually lock cellular signal. It still says 'Emergency Calls Only'. I am on Mobilicity, which used to be AWS, but now I believe is under Rogers. I know mobilicity used to take a while to connect, but I doubt that is the same now. This may be due to the old modem, so I will try updating the modem back to the 4.4 one... wish me luck
EDIT:
Without the modem update, it just connected to mobilicity !
Now the issue is, whether this phone will re-lock again once I flash 6.0.1...
Thank you very much audit13 for your live help!!
I will post back in a week or so (hopefully I remember...) whether this unlock sticks.
The 317m does not natively support was frequencies. You'll have to software enable was support.
You mean it doesn't ask for network unlock pin?
audit13 said:
The 317m does not natively support was frequencies. You'll have to software enable was support.
You mean it doesn't ask for network unlock pin?
Click to expand...
Click to collapse
Yup. It unlocked for sure. But that is no different than what I had before updating to 6.0.1. I've used the phone without problems on Mobilicity for 2-3 years.
Mobilicity is no longer AWS, so it has no problems connecting to the network. It just takes a while, especially with the 4.1.1 modem...
Now I'm just restoring the TWRP backup that I have made on 6.0.1 to see if the unlock sticks.
The unlock stayed for my phone when I installed a custom rom.
audit13 said:
The unlock stayed for my phone when I installed a custom rom.
Click to expand...
Click to collapse
Yes, that was the case yesterday as well. It stuck for a day, but after the cell lost the signal once (zero bars, emergency calls only), the phone got re-locked.
Now that I have restored the 6.0.1 backup, the phone is back up and running with it unlocked. Now ill will see how long this lasts.
Thank you very much for your continued support
I am having this issue now.. but the strange thing is that I've flashed to the Resurrection 6.0 rom a while back and it was working fine. Until a while ago I was pokemon hunting and all of a sudden my network died and its been asking me for a sim network pin... I was getting the intermittent network disconnect when I was on the Pokemon go app too long but it would reconnect back to the network after a short time.. not sure if it has something to do with the game app. Well, now I've downloaded the latest Resurrection rom and flashed it again doing a factory wipe but still nothing. I'm going to try and flash the modem and see if that helps.
EDIT: forgot to mention I'm on Koodo network which is also Telus, I believe. But now it wants to automatically connect to the rogers network hence I'm assuming its asking for the PIN.
(edited for grammar)
This is really strange that this happens. I've unlocked a few note 2 phones and none of them have relocked.
Did you change the csc in the phone settings to Koodo?
audit13 said:
This is really strange that this happens. I've unlocked a few note 2 phones and none of them have relocked.
Did you change the csc in the phone settings to Koodo?
Click to expand...
Click to collapse
do you know why I cannot do the universal unlock method by entering the *#197328640# method? when I enter those digits nothing happens..
EDIT: Forgot to mention that the newest Resurrection rom did not work so I tried DNA 4.4 rom and still asking for unlock pin.. damn. need a new phone it seems..
I believe you need to be running a particular version of the stock Samsung dialler.
audit13 said:
I believe you need to be running a particular version of the stock Samsung dialler.
Click to expand...
Click to collapse
What's the csc you mentioned?
Csc is a carrier customization file. If you change the csc, which can be done using a stock rom, you can choose the carrier for whom the rom phone was intended. I choose Telus as a carrier because they have very little bloatware.
audit13 said:
Csc is a carrier customization file. If you change the csc, which can be done using a stock rom, you can choose the carrier for whom the rom phone was intended. I choose Telus as a carrier because they have very little bloatware.
Click to expand...
Click to collapse
I'm using this rom
http://forum.xda-developers.com/showthread.php?t=2541860
which is a modded stock rom I believe but I don't know how to edit the csc file.

Question Help...

Ok I had my bootloader unlocked. Sim network all that unlocked. The bootloader locked by itself now I have no mobile data. And it shows on the fastboot screen fc4 under locked. What does fc4 mean?
Woah. That's rare, I only saw this twice. Though once was on a OP2.
Well, you want to unlock it again? It may hard-brick your device, if you're willing to fix it after hard-bricking it then by all means do so.
What I'd do here is update the system, or sideload an update, then attempt to unlock it. I don't know if that would work though, so do it on your own risk.
If you happen to brick your device then you can flash your stock ROM through EDL mode. Here is a full guide.
I have did everything even went back into tmobile os. Everything worked good except for my mobile network.The sim card was grayed out couldn't access any apn anything to do with mobile data. I just sent it back it was a replacement. See I was fooling around with that unofficial twrp then my network relocked itself then but I was still using my same modem. It wouldn't even let me network unlock anymore TMobile mobile couldn't even unlock it. It was weird
amaroney55 said:
I have did everything even went back into tmobile os. Everything worked good except for my mobile network.The sim card was grayed out couldn't access any apn anything to do with mobile data. I just sent it back it was a replacement. See I was fooling around with that unofficial twrp then my network relocked itself then but I was still using my same modem. It wouldn't even let me network unlock anymore TMobile mobile couldn't even unlock it. It was weird
Click to expand...
Click to collapse
I don't think anyone can help you here mate, for all I know you may have a bad motherboard and need a new SoC.
Maybe you should just get a new phone. That's a really rare issue.
You may need to take it back to the T-Mobile store...

Categories

Resources