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[Q] Official Tmobile JIC6 Update loses unlock

Ok.. sooo.. Some people have gotten the JIC ota update from tmobile USA.. Well i decided to go ahead and update it. Well I lost the carrier unlock on it now.
I was just the stock rom on it rooted and unlocked using the one click unlock to get teh codes to unlock the phone. It worked then. Now with the JIC6 update i have lost that unlock. Also the one click unlock app to get the codes no longer works. I have also seen other post about using a hex editor to look at the nv_data.bin file to look for the unlock codes (no success). I have the original code from before the update, but it does not work. Is there a Way to unlock the vibrant with the JI6 update?

Just enter the same code you got last time. and it will unlock you.
If anyone else reads this. Please keep your code. and put it someplace safe. everytime you flash you will need to re-unlock most like a iphone.

Interseting that i didnt even have to reenter it. First when i updated and than checked teh network lock code showing that it was on so i than proceded to use the one click unlock app and it didnt not work. SO lucky for me i have a screenshot of the code when i first used the unlock app. so i did the same process and put in another carrier sim and entered the unlock code. It told me it was unsuccessful. Now that i went to try it again after my first post. I procceded to put in the other carrier sim card and it was unlocked.
Oh well. Thanks!

rhcp0112345 said:
Just enter the same code you got last time. and it will unlock you.
If anyone else reads this. Please keep your code. and put it someplace safe. everytime you flash you will need to re-unlock most like a iphone.
Click to expand...
Click to collapse
He says in the OP that he has the original code, but it doesn't work.
I know this is actually a known Samsung problem that has happened on many of their phones (even ones that came unlocked from what I've read) & generally re-entering the key works.
If it doesn't work for me, I'll call up TMO & complain. I bought the phone at retail price off contract, so they should give the code w/o a problem.
Generally as long as you've been a customer with them for at least 30-90 days (and your phone is beyond the returnable period), they'll give the unlock code if you call & ask for it. Sometimes you have to say that you'll be travelling out of country in order to get them to give it to you.

Is there a way to unlock without putting in a foreign SIM?

WTF !
Do you mean that updating the device to JI6 will lock the phone ?!
I unlocked mine with a code is that means I'll lose the unlock ?!

I discovered this a few weeks ago. I was working on a fix when I bricked my phone.
I just got my replacement on Tuesday and will be continuing the fix.
What happens is either something within the ODIN process, or on the rom itself puts a generic bml3 block on that contains all F's where the unlock code is stored.
I also know that it's stored on the nv_data.bin in the ./efs block.
I have been able to get my unlock code to be seen by the sgux program when modifying the bml3 file and pushing it back to my phone.
I will be working on nv_data next, though, seeing as my new phone has the unlock codes already, I'll have to do some editing and backing up.

I have my old codes with me so can someone confirm if old codes still works after the update ?

Thanks for sharing the information with us regarding phone. It may help us n the future.
Steve

mohitmoudgil said:
I have my old codes with me so can someone confirm if old codes still works after the update ?
Click to expand...
Click to collapse
Yeah after my original posts i think your old code will work. It will probably give an error of that it was unsuccessful. Just ignore it. and and just reboot the phone.
so basically to recap what i did.
updated JIC6 ota with tmobile.
checked network lock *#7465625# ( showing that the network lock was on.)
tried that software one click app to get code. (unsuccessful)
powered off phone
put in another carrier sim card.
bootup phone.
put in old code i had from before update to jic6 ( says that it was unsuccessful )
power off phone
put back Tmobile sim
power off phone
put other carrier sim in
unlocked!

i dont have tmobile sim ...do you think it needs that ?

I ran into this on my old vibrant running jfd. Unlocked and rooted and I needed to reflash jfd with odin. Phone relocked itself even reflashing same firmware. Efs data didn't change because the unlock code could still be retrieved. But when I inserted my att sim the code unlock said unsuccessful no matter what I tried. It never unlocked again.

sabooher said:
I ran into this on my old vibrant running jfd. Unlocked and rooted and I needed to reflash jfd with odin. Phone relocked itself even reflashing same firmware. Efs data didn't change because the unlock code could still be retrieved. But when I inserted my att sim the code unlock said unsuccessful no matter what I tried. It never unlocked again.
Click to expand...
Click to collapse
So old codes didnt work for you and you are stuck.
can anyone confirm if we should update or not to remain unlocked ?

anyone confirming this ?
I got two different statements here

Ok, I updated my vibrant to JI6 today and it didn't lock my device !!
Since I don't use T-mobile data plan so I downloaded the leaked rom from (Vibrant Android development) section then I flashed the stock rom followed by JI6 ROM and it's working perfect !!
Maybe because mine is unlocked officially by T-Mobile code !

Or may be only ota is locking
We need more info
Sent from my SGH-T959 using Tapatalk

Updated mine through odin.. still unlocked.

thanks...i just updated with odin and mine is unlocked
Now time to check whats new :d

They will not release a code nor will att for 9 months after the phone is out. You may call and ask.
Thats why i offer unlock services for these phones.

Successful OTA update yesterday, NO NETWORK LOCK, phone was rooted with no lag fix

AT&T Galaxy Tab Unlock Code not working

Anyone have any idea why my Unlock code won't work when entered. It says unsuccessful when I enter it.
AT&T i987
running Russian to Euro firmware method & modem file
using T Mobile Sim to trigger the Unlock Field at boot.
Purchased from Cellunlocker.net - they insist the code is correct
Does it need a different modem file?
thanks

3dadd said:
Anyone have any idea why my Unlock code won't work when entered. It says unsuccessful when I enter it.
AT&T i987
running Russian to Euro firmware method & modem file
using T Mobile Sim to trigger the Unlock Field at boot.
Purchased from Cellunlocker.net - they insist the code is correct
Does it need a different modem file?
thanks
Click to expand...
Click to collapse
Check that your IMEI was not changed after reflashing. If not then it is very likely that unlock would work only with your original firmware. If it has been changed then something important got corrupted causing unlock to fail.
I've received unlock code from US T-mobile and it dod not work also after reflashing.
However, changing one byte in the system file as it descibed multiple time worked without any issue on both tmobile and att tabs.

3dadd said:
Anyone have any idea why my Unlock code won't work when entered. It says unsuccessful when I enter it.
AT&T i987
running Russian to Euro firmware method & modem file
using T Mobile Sim to trigger the Unlock Field at boot.
Purchased from Cellunlocker.net - they insist the code is correct
Does it need a different modem file?
thanks
Click to expand...
Click to collapse
Easy way to fix this:
http://forum.xda-developers.com/showthread.php?t=843323

Cellunlocker are not able to get the code.
My samsung is not rooted and I think I can not unlock or root it by myself.
Any idea to help me????

Unlock code for tab
I got a code from cellunlocker.net too, and initially it came back incorrect, saying "sim net pin error" or something like that and they too insisted it was correct,
BUT what i realized is that the was the code was correct and I had to follow the instructions here:
http://forum.xda-developers.com/showthread.php?t=843323
seems like alot of tabs the IMEI changes, or the software has to be adjusted

software unlock

I did the software unlock via the dial code & UMTS menu, I can make phone calls with a different carrier sim, but I cannot get the data to connect. I have been searching xda and google for months trying to get this to work. I have a Canadian Bell mobilty i337m. Stock rom (mdj) and its rooted. I have tried factory reset several times but it doesnt fix it. I also tried flashing back to stock with odin. Does anyone have any other ideas?
When I try a telus (or other provider) sim, it give me voice service only and in the about > status menu the mobile network state either says disconnected or connecting. I have the data toggle on also.

Those unlocks don't work that well with the Canadian variants. They're designed for the i337 not the i337m.

Have you made sure the apn is set up right for the carrier?

Maybe this will help
Code:
http://apn-settings.com/canada/apn-settings-bell-mobility/

I will say the reason that cause the problem is that this is an ATT phone with At stock ROM. So it doesn't have the APN setting for other carries. You should set that by yourself.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

ve6ay said:
Those unlocks don't work that well with the Canadian variants. They're designed for the i337 not the i337m.
Click to expand...
Click to collapse
ksj0823 said:
I will say the reason that cause the problem is that this is an ATT phone with At stock ROM. So it doesn't have the APN setting for other carries. You should set that by yourself.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
Not true. I successfully unlocked my first S4 I337M on Bell following this tutorial. I sold that one because I was able to make a profit once I unlocked and flashed the AWS mod to make it compatible with WIND and Mobilicity.
simplywinter said:
I did the software unlock via the dial code & UMTS menu, I can make phone calls with a different carrier sim, but I cannot get the data to connect. I have been searching xda and google for months trying to get this to work. I have a Canadian Bell mobilty i337m. Stock rom (mdj) and its rooted. I have tried factory reset several times but it doesnt fix it. I also tried flashing back to stock with odin. Does anyone have any other ideas?
When I try a telus (or other provider) sim, it give me voice service only and in the about > status menu the mobile network state either says disconnected or connecting. I have the data toggle on also.
Click to expand...
Click to collapse
Try reflashing the original 4.2.2 firmware from here and then immediately follow this tutorial before rooting (do not install any system updates!). Then you can root, install custom recovery, reset the flash count, etc.

All questions and help issues go in Q&A and Help section
Thread moved
Thanks
FNM

MrKhozam said:
Not true. I successfully unlocked my first S4 I337M on Bell following this tutorial. I sold that one because I was able to make a profit once I unlocked and flashed the AWS mod to make it compatible with WIND and Mobilicity.
Try reflashing the original 4.2.2 firmware from here and then immediately follow this tutorial before rooting (do not install any system updates!). Then you can root, install custom recovery, reset the flash count, etc.
Click to expand...
Click to collapse
You did exactly what I am in the process of doing. I will try what you suggested now. Thanks!
Also, ive manually inputed apns for telus and eastlink and neither seem to work. I can always make voice calls, but the data will not connect.

ksj0823 said:
I will say the reason that cause the problem is that this is an ATT phone with At stock ROM. So it doesn't have the APN setting for other carries. You should set that by yourself.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
oddly enough, when I put a telus sim in it and waited for a while (in hopes it would eventually connect to data) and the apn settings for telus were in the phone. I know I didnt put them there because the apn settings for koodo were also present along with a third apn that I cant remember.

For future reference, try not to double post. Just edit your current post.
simplywinter said:
oddly enough, when I put a telus sim in it and waited for a while (in hopes it would eventually connect to data) and the apn settings for telus were in the phone. I know I didnt put them there because the apn settings for koodo were also present along with a third apn that I cant remember.
Click to expand...
Click to collapse
It's actually not an odd thing to happen. Once an activated SIM is inserted and the phone is unlocked, the phone searches for the best APN settings from all compatible carrier bundles. Some phones do this more accurately than others. However, it may not do this well enough if a custom ROM is installed. I know this to be true because this happened with my older Galaxy S3 when I tried selling it to someone (it was a T-Mobile unlocked running CM 10.0 at the time). However, setting the APN manually (assuming all settings are correct and that nothing else is wrong with the phone) should resolve your issues.
If you're still having problems, I suggest doing these things:
1. Try going into your network operators and let the phone search for carriers nearby. Once the list shows up, tap on Telus and wait until that screen closes on its own.
2. If you can't get data going yet, try disabling it, re-enabling, and reboot.
3. If this still doesn't work, try going into the network mode screen and select GSM/LTE and reboot.
4. If it's still derping on you, then it must either be your SIM not connecting to Telus's data network, or your account has a data block. That's all I can really think of.
Good luck.

MrKhozam said:
For future reference, try not to double post. Just edit your current post.
It's actually not an odd thing to happen. Once an activated SIM is inserted and the phone is unlocked, the phone searches for the best APN settings from all compatible carrier bundles. Some phones do this more accurately than others. However, it may not do this well enough if a custom ROM is installed. I know this to be true because this happened with my older Galaxy S3 when I tried selling it to someone (it was a T-Mobile unlocked running CM 10.0 at the time). However, setting the APN manually (assuming all settings are correct and that nothing else is wrong with the phone) should resolve your issues.
If you're still having problems, I suggest doing these things:
1. Try going into your network operators and let the phone search for carriers nearby. Once the list shows up, tap on Telus and wait until that screen closes on its own.
2. If you can't get data going yet, try disabling it, re-enabling, and reboot.
3. If this still doesn't work, try going into the network mode screen and select GSM/LTE and reboot.
4. If it's still derping on you, then it must either be your SIM not connecting to Telus's data network, or your account has a data block. That's all I can really think of.
Good luck.
Click to expand...
Click to collapse
Ok, reflashed stock 4.2.2 (the first one) and manually entered TELUS apn settings from the telus website, got data to connect finally. As a note, there was a typo in the apn settings that it auto aquired for telus. Going to try a eastlink sim tomorrow and hopefully AWS is working.
Edit: all seems to work. thanks everyone!!

Why can't my S4 dial codes?

I'm trying to try some methods to unlock my AT&T S4. I'm still on MDL firmware, it is rooted but I never unlocked it and now I really want to because I just came back from an overseas trip and didn't have use of my phone. However, all the methods require I be able to dial or enter into some kind of service mode like *#9090# or *#0011#. However after I hit the last # nothing happens, I hit the Call button and I see a USSD Code Runnning then 'Connection problem or invalid MMI'. I can't get anywhere without being able to enter into any of the service menus. Can anyone tell me why or how I can fix this?
Also, I wouldn't be opposed to updating to the latest firmware through AT&T (I disabled the OTA update pushing thing long ago) and then rooting and unlocking with the latest methods. Is this possible right now? But I still need to get the dialing code issue fixed I believe. I would still need to be able to crack through the AT&T wifi tethering feature in the phone which I have right now on MDL, its very important to me. If it can't be done on the latest firmware then I'll just have to wait another 6 months for my contract is up then AT&T will give me the sim unlock code.
Please Help!
Oh, and I just remembered AT&T actually provided me with a sim network unlock code which I didn't try to enter until I was overseas, about a year had passed already. The code didn't work and I actually found that it was just my IMEI#. I'm assuming that was never going to work anyways and whoever gave me that was just messing with me?

You can try flashing the MF3 modem through recovery and then running regionlockaway app. If that doesn't work, you can flash the stock MDL firmware using Odin. The firmware can be downloaded from sammobile site.

Doesn't your phone ask for a unlock code when you insert a different SIM card?

jmjoyas said:
You can try flashing the MF3 modem through recovery and then running regionlockaway app. If that doesn't work, you can flash the stock MDL firmware using Odin. The firmware can be downloaded from sammobile site.
Click to expand...
Click to collapse
If I do this then will I lose root? If so will I be able to recover it?
abhishek1234321 said:
Doesn't your phone ask for a unlock code when you insert a different SIM card?
Click to expand...
Click to collapse
Yes it does, but AT&T won't give me a code.

ChuckWow550 said:
If I do this then will I lose root? If so will I be able to recover it?
Yes it does, but AT&T won't give me a code.
Click to expand...
Click to collapse
Flash the modem won't lose root. If you use Odin you will have root afterwards
Sent from my Nexus 9 using XDA Free mobile app

S8 unlocked but no service

I bought used S8 that had clean IMEI (not blacklisted), it was locked on Sprint and with financial eliglibity. Before I got it unlocked it didn't recognised any sim card, after unlocking it did regular setup on my ATT card with all the ATT apps but it doesn't have service. Then I tried with Verizon SIM and it did the same, regular setup but no service. What do you think what's the problem ?
Phone build number : R16NW.G950USQS3CRE2

Is it rooted, and if it is, have you uninstalled any system packages
If not, try a factory reset and making sure the sim is active and APN settings are working and you have chose a network

haroon.y said:
Is it rooted, and if it is, have you uninstalled any system packages
If not, try a factory reset and making sure the sim is active and APN settings are working and you have chose a network
Click to expand...
Click to collapse
It's not rooted, I did remote unlock with unlocking service and they flashed original firmware on it, nothing should be messed up.
I did factory reset few times as well as network reset. I double checked APN info and ofc it's setted up together with card.
I forgot to mention that phone is not showing up IMEI, actually nothing when I type *#06# in dial

that mean you lost imei ....flash factory firmware by yourself...it will do the trick

khawarjaved said:
that mean you lost imei ....flash factory firmware by yourself...it will do the trick
Click to expand...
Click to collapse
Can you explain me which one I need ? What about bootloader, is it the same ? I've checked thread about bootloader and mine is "carrier firmware", not unlocked.

Which career search for career. Look at the build number in abiut and search for that.

I'm using ATT and my phone was locked on Sprint, so I flashed Sprint firmware and It's the same. I put the SIM card in, it did ATT setup and all of the apps from carrier but it's still block sign instead of signal sign in top right corner and airplane mode is light blue (not usual blue like when you turn it on)
At least this time it's showing up imei in dialer
I couldn't find ATT firmware, if someone knows there's my build number in first post.