I have a rooted an unlocked i337m. It has an imei of 0 and I have no idea what to do since any Sim card I put in it says unregistered Sim.
1. Can anyone please point me Ina direction of a DIY fix?
2. I was going to try and flash back to stock via Odin since I'm only on 4.2.2 rooted but the phone was rooted when I bought it and bloatware removed.so I have no idea what carrier it's on. Any ideas on how to find that out do I can know which stock firmware to flash? Thanks for any help
If no custom rom or buildprop modified, you should be able to check buildprop for original carrier afaik
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I have a galaxy S 4 for Cricket model SCH-R970C. I need to unlock the phone to able to use the SIM slot outside the U.S. I've been able to root the phone and I tried flashing a i9505 ROM thinking that would unlock the use of the SIM with no luck. The baseband modem firmware does not change when I flash a different ROM. There is little to no info out there about the cricket GS4. Is it possible to flash different modem firmware so that the phone can behave as an i9505 model? The hardware is the same... just can't change the modem firmware.
I need this ASAP otherwise I need to find a new phone! I'm not in the US now and calling Cricket is not an option. I tried flashing a different modem firmware using ODIN but it fails. What am I missing?
Any help would be appreciated. I'm willing to "donate" $$ for a solution. Thanks.
wallygator4life said:
I have a galaxy S 4 for Cricket model SCH-R970C. I need to unlock the phone to able to use the SIM slot outside the U.S. I've been able to root the phone and I tried flashing a i9505 ROM thinking that would unlock the use of the SIM with no luck. The baseband modem firmware does not change when I flash a different ROM. There is little to no info out there about the cricket GS4. Is it possible to flash different modem firmware so that the phone can behave as an i9505 model? The hardware is the same... just can't change the modem firmware.
I need this ASAP otherwise I need to find a new phone! I'm not in the US now and calling Cricket is not an option. I tried flashing a different modem firmware using ODIN but it fails. What am I missing?
Any help would be appreciated. I'm willing to "donate" $$ for a solution. Thanks.
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Click to collapse
Hi,
You should not flash a modem that is not meant for your phone.
You are risking a brick if you try it.
Your best bet may be to just buy an unlock code online.
Sent telepathically from my S4
wallygator4life said:
I have a galaxy S 4 for Cricket model SCH-R970C. I need to unlock the phone to able to use the SIM slot outside the U.S. I've been able to root the phone and I tried flashing a i9505 ROM thinking that would unlock the use of the SIM with no luck. The baseband modem firmware does not change when I flash a different ROM. There is little to no info out there about the cricket GS4. Is it possible to flash different modem firmware so that the phone can behave as an i9505 model? The hardware is the same... just can't change the modem firmware.
I need this ASAP otherwise I need to find a new phone! I'm not in the US now and calling Cricket is not an option. I tried flashing a different modem firmware using ODIN but it fails. What am I missing?
Any help would be appreciated. I'm willing to "donate" $$ for a solution. Thanks.
Click to expand...
Click to collapse
Any luck?
I tried the same thing i put t-mobile firmware on it. no luck. I was thinking of changing the baseband version . but im lost...
tonys2teg said:
Any luck?
I tried the same thing i put t-mobile firmware on it. no luck. I was thinking of changing the baseband version . but im lost...
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Click to collapse
No, i gave up on the phone. I don't think it's that easy to change the baseband firmware on the phone. I didn't try buying an unlock code, but that might be the only solution for now - just make sure the unlock code is specifically for the cricket model.
Has any managed unlock it? I need older modems in order to complete. The unlocking please provide me with them if you have.
Hi,
I have recently sim unlocked my SPH-L720 that means my Sprint Galaxy S4 is now working on T-Mobile sim. In order to do this I had to downgrade my baseband to MVC. Earlier I had NAE baseband. I think I read somewhere that I cannot upgrade my baseband version which will revert SIM unlock.
I want to install custom ROMs on my unlocked Sprint mobile now. Can someone please tell me how many custom ROMs can I install on my modified device? I am very much inclined towards installing Carbon Rom but not sure whether it will break away sim unlock feature. Here is the link to the post. http://forum.xda-developers.com/nexus-4/orig-development/rom-carbonrom-kitkat-t2630336
Please guide..
Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before. And is it possible to use custom Roms from At&t in other countries thanks in advance [emoji2]
Send from my UNBENDABLE NOTE 3 ?<br/>
Send from my UNBENDABLE NOTE 3 ?
Leonidas300 said:
Hi guys one of my friends bought a S4 in the US, It's AT&T locked SGH-I337 so can't use it with sim in our country (South Africa)We have two models of S4 here, the I9500&I9505. Was wondering what the right steps is to get the phone working? Must I root the phone and flash custom Rom & kernel or just unlock sim card? I'm not new to Rooting or flashing Roms but haven't fidled with carrier locked phones before. And is it possible to use custom Roms from At&t in other countries thanks in advance [emoji2]
Send from my UNBENDABLE NOTE 3 ?<br/>
Send from my UNBENDABLE NOTE 3 ?
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The Sgh-i337 is basically the same as the gt-i9505 EXCEPT for ATT locking the bootloader on that model.
You CAN Sim unlock it so you can insert your Sim into it. You will have to reach it a bit though. It helps if you know what firmware is installed on the phone. If it is MDB, MDL, or MF3 it would be easier to do I believe. Either way look for the threads about unlocking.
If you have NEWER firmware then there are separate threads for it, and it will more than likely need to be rooted, flash a older modem, then perform the Sim unlock from the menu. If you cannot find the correct post I can help look for it later.
Just reply back with WHAT firmware and Baseband you have installed on the phone and we should be able to help you further.
If you do have MDB or MDL firmware do NOF update it...
RockRatt said:
The Sgh-i337 is basically the same as the gt-i9505 EXCEPT for ATT locking the bootloader on that model.
You CAN Sim unlock it so you can insert your Sim into it. You will have to reach it a bit though. It helps if you know what firmware is installed on the phone. If it is MDB, MDL, or MF3 it would be easier to do I believe. Either way look for the threads about unlocking.
If you have NEWER firmware then there are separate threads for it, and it will more than likely need to be rooted, flash a older modem, then perform the Sim unlock from the menu. If you cannot find the correct post I can help look for it later.
Just reply back with WHAT firmware and Baseband you have installed on the phone and we should be able to help you further.
If you do have MDB or MDL firmware do NOF update it...
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Click to collapse
Thanks for reply ,I have NC1 firmware and I used Method 3 on this guide http://forum.xda-developers.com/showthread.php?t=2595457 .SUCCESS!
Could you recommend a modem I could try other than MF3 as the signal isn't that great ?
Leonidas300 said:
Thanks for reply ,I have NC1 firmware and I used Method 3 on this guide http://forum.xda-developers.com/showthread.php?t=2595457 .SUCCESS!
Could you recommend a modem I could try other than MF3 as the signal isn't that great ?
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Click to collapse
Not sure which would work best for your area. You can download and try any/all of them until you find one that works best. You can switch back and forth with no issues without worries
I'm new to rooting ATT phones, my wife just go a free ATT S4 I337UCUFNC1 from a friend and I want to root, convert it from ATT to T-Mobile phone then unlocking it.
The phone doesn’t have a sim yet but I'm planning on putting my wife's present T-mobile sim in there.
I'm very familiar with the T-mobile Samsung S4 version.
I've read that I need a safestrap after root?
Can I update to 4.4.4?
Can someone point me in the right direction?
LEGEND94 said:
I'm new to rooting ATT phones, my wife just go a free ATT S4 I337UCUFNC1 from a friend and I want to root, convert it from ATT to T-Mobile phone then unlocking it.
The phone doesn’t have a sim yet but I'm planning on putting my wife's present T-mobile sim in there.
I'm very familiar with the T-mobile Samsung S4 version.
I've read that I need a safestrap after root?
Can I update to 4.4.4?
Can someone point me in the right direction?
Click to expand...
Click to collapse
Follow this to root http://forum.xda-developers.com/showthread.php?p=56453100. To run on tmobile you'll have to sim unlock it. Try regionally away
http://forum.xda-developers.com/showthread.php?p=46187852
Sent from my Nexus 9 using XDA Free mobile app
To Sim unlock, flash the MF3 modem in safestrap recovery and then run regionlockaway app.
Thanks alot, I was able to boot in Safestrap Recovery but after I rebooted from that and then tried to reboot back into Recovery Safestrap FC'ed. I tried uninstalling the app and reinstalling it but is FC'ed again, dunno what's it going on.
How do I get back into Recovery if Safestrap is FC'ing? (I'm trying to flash the MF3 modem)
NVM, Got back into recover, flashed the modem now and used Region SimLock, I took my T-Mobile sim and put it in the AT&T phone and it works.
Now I will try to convert it from AT&T to a T-Mobile Phone using : http://forum.xda-developers.com/galaxy-s4-att/general/convert-i337-to-m919-wifi-caling-t2896719
Quick Question
If I use this method to convert from a AT&T to T-Mobile will I loose the Unlock Sim?
Would I be able to use Region SimLock again with the being updated to 4.4.4?
Got everything going... completed!
Thanks!
Hey people, I have an issue going on here.
I was going to unlock, but decided to reflash firmware and change the csc from rogers over to bell.
Kies recognizes the phone now as being a 'bell' phone, and have done an update just to confirm it but it still will not accept a bell sim. Every time I have inserted a bell sim it requests the 4 digit unlock code. The sim works just fine in my S3 and another bell S4, so that is not the problem.
All settings in the phone also show it to be 'bell', home screen and all, so the csc did take.
All the modems/firmware on sammobile are multi-csc, as i have tried to just flash the modem alone after I extracted it.
I could care less about being truly carrier free, as I am locked into a bell agreement through work.
Any suggestions on this, or do i have to purchase a code? I assume its locked now so I cannot downgrade to my understanding to a lower modem to use the service menu to unlock.
Thanks for the input.
I've flashed from a Bell 4.4.2 to Telus 5.01 without issue and the phone will remain sim-locked. The only difference I have seen between the Bell, Telus, and Rogers ROM are the carrier apps included with each ROM.
The sim unlock code is 8 digits long.
You should be able to downgrade the i337m's 5.01 stock ROM to a i337m 4.4.2 stock ROM. Then install the 4.2.2 modem, root the phone, run region unlock app, re-flash stock 5.01, and the phone will be sim unlocked. Doing this will trip the knox counter to 1 and void any remaining warranty.
I tried to downgrade, but it didnt take. I will try again. I know there was a discussion on booting the phone and not signing into google then reflash again. Is this needed?
Thanks for the reply.
Well, I got it to work this time. Much appreciated
You tried to flash a stock 4.4.2 rom from sammobile.com? Were there errors in Odin?