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I've for a AT&T S4 I337 with the MF3 update. I have already managed to root it. Is there any way to unlock the sim?? I have searched. Tried to get to the service menu and it does't let me do anything. Can I flash another rom or do something so I can unlock it.
NOplaymaker said:
I've for a AT&T S4 I337 with the MF3 update. I have already managed to root it. Is there any way to unlock the sim?? I have searched. Tried to get to the service menu and it does't let me do anything. Can I flash another rom or do something so I can unlock it.
Click to expand...
Click to collapse
Seeing how you are on the MF3 currently there is no way to flash another rom or custom recovery, your best bet would be go through att to get the unlock code.
But it won't even let me get into the service menu. I tried the codes and process they say online and it does nothing. Can someone explain why it won't budge and how and when it will be fixed?
ronnie498 said:
Seeing how you are on the MF3 currently there is no way to flash another rom or custom recovery, your best bet would be go through att to get the unlock code.
Click to expand...
Click to collapse
The service menu unlock was disabled in MF3. You have to get an unlock code from your carrier or another service.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
DeadlySin9 said:
The service menu unlock was disabled in MF3. You have to get an unlock code from your carrier or another service.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
Theres not even a place to enter an unlock code. I cut my Straight talk sim with the proper tool and inserted it and it didn't even recognize it. Still says "no sim inserted." Going to try to buy a ATT straight talk sim from the Straight talk website next.
Unlock Code AT&T, they have no idea
DeadlySin9 said:
The service menu unlock was disabled in MF3. You have to get an unlock code from your carrier or another service.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
I ported my # over from AT&T today to Straight Talk. At first it didn't like the new sim card, but after my # was ported and a few reboots the message didn't come up anymore. I now have phone & data service running on it, even though I was still under contract for a previous device (S3). I called AT&T and after a lengthy call, they said I didn't need an unlock code if I was getting service OK from Straight Talk. My old APN info is still there for them along with the one I created for 'ST'. I have no way of deleting the old APN, and who knows where, or if I'll get updates from. My only other option was to get the Google Edition S4, but I payed full price for the one I got now. Hopefully the bootloader issue will get cracked before long and I can get this ATT crap off my phone for good.
Network lock
I want to share something, could get passed the first screens all the way down to the network lock menu, no sha off options.
Haven't seen any posts regarding this.
Pictures attached
NOplaymaker said:
I've for a AT&T S4 I337 with the MF3 update. I have already managed to root it. Is there any way to unlock the sim?? I have searched. Tried to get to the service menu and it does't let me do anything. Can I flash another rom or do something so I can unlock it.
Click to expand...
Click to collapse
have you tried chainfires region lock away at http://forum.xda-developers.com/show....php?t=2470551
it worked for my s4 running MF3
tal27416 said:
have you tried chainfires region lock away at http://forum.xda-developers.com/show....php?t=2470551
it worked for my s4 running MF3
Click to expand...
Click to collapse
i can confirm this works. I tried it on my s4 and my phone is now unlocked. thanks:victory:
tal27416 said:
have you tried chainfires region lock away at http://forum.xda-developers.com/show....php?t=2470551
it worked for my s4 running MF3
Click to expand...
Click to collapse
Worked like a charm on my At&t Galaxy S4 on MF3 firmware just saved me $30 for an unlock code off Ebay Link is dead though heres the link i used...http://forum.xda-developers.com/showthread.php?t=2470551
final unlock ! done for me
there is a video on youtube called .. " Galaxy s4 MF3 unlock. "
i do have i337 ..
in the video it misses
In "COMMON" screen, select [6] NV REBUILD
Now you are in the "NV REBUILD" screen, you should see the following text:
------------------------------
Golden-Backup exist
You can Restore Cal/NV
------------------------------
Now for the final step.
In "NV REBUILD" screen, select [4] Restore Back-up
Tested on: I337
finally, after doing 4 hours of hard research and almost brick my phone planning on using .pit for downgrade..
Does anyone know the default settings?
Sent from my SGH-I337 using XDA Premium 4 mobile app
malboro13 said:
there is a video on youtube called .. " Galaxy s4 MF3 unlock. "
i do have i337 ..
in the video it misses
In "COMMON" screen, select [6] NV REBUILD
Now you are in the "NV REBUILD" screen, you should see the following text:
------------------------------
Golden-Backup exist
You can Restore Cal/NV
------------------------------
Now for the final step.
In "NV REBUILD" screen, select [4] Restore Back-up
Tested on: I337
finally, after doing 4 hours of hard research and almost brick my phone planning on using .pit for downgrade..
Click to expand...
Click to collapse
Hey,
I did watch that video, but I am not sure how to get to that "Samsung Service Mode" Screen . Can you tell the steps please.
Thanks.
Ok, isnt that region lock thread just for Galaxy Note 3s? and on MF3, doesnt seem like the service menu will come up at all, so kinda curious too how people are making that work.
xuanphucn said:
i can confirm this works. I tried it on my s4 and my phone is now unlocked. thanks:victory:
Click to expand...
Click to collapse
lylon said:
Worked like a charm on my At&t Galaxy S4 on MF3 firmware just saved me $30 for an unlock code off Ebay Link is dead though heres the link i used...http://forum.xda-developers.com/showthread.php?t=2470551
Click to expand...
Click to collapse
Hey did you guys talking about region unlock or carrier unlock?
Can you please share steps you followed, it will be a great help.
Thanks.
It's been mentioned that region unlock has had a positive affect on the Sim unlock.
However Sim unlock and region unlock are totally different from one another.I used the free unlock method when I was MDL and only used the region unlock with MF3 .will I ever really know if the region unlock worked?probably never.
I am still Sim unlocked
Sent from my SPH-L720 using XDA Premium 4 mobile app
mild4u said:
Hey did you guys talking about region unlock or carrier unlock?
Can you please share steps you followed, it will be a great help.
Thanks.
Click to expand...
Click to collapse
root ur phone and download the region unlock app on google play and done :fingers-crossed:
Again, the region lock claims for note 3... so if people say it works on S4.. why isnt it listed on the app? Would love some confirmation.
lylon said:
Worked like a charm on my At&t Galaxy S4 on MF3 firmware just saved me $30 for an unlock code off Ebay Link is dead though heres the link i used...http://forum.xda-developers.com/showthread.php?t=2470551
Click to expand...
Click to collapse
:good::good::good: I tried this and working like a charm.. !!!! I tried Simple Mobile card...
Thanks xuanphucn....it work fine.
xuanphucn said:
root ur phone and download the region unlock app on google play and done :fingers-crossed:
Click to expand...
Click to collapse
Mysticalses,
I was scared at first but thought to give it a try...
- Rooted the phone using a video on youtube: Root Your Samsung Galaxy S4 [ by OfficialSoftModder]
- RegionLockAway
Mysticales said:
Again, the region lock claims for note 3... so if people say it works on S4.. why isnt it listed on the app? Would love some confirmation.
Click to expand...
Click to collapse
Ditto...checked with Simple Mobile card though not activated so wasn't able to test calls...but at least it didn't ask for a unlock code or anything and showed SimpleTalk voice mail notification....
mysocks said:
:good::good::good: I tried this and working like a charm.. !!!! I tried Simple Mobile card...
Click to expand...
Click to collapse
is flashing official rom from sammobile.com will brick my mobile???
or create IMEI problem.
As i rooted my current official firmware. i want to go back to stock. but i took backup of my efs folder but i haven't found any nv_data file on it.
Please advise is official rom will to create IMEI probem.
Depends on which phone and firmware u got
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4
Demented22 said:
Depends on which phone and firmware u got
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4
Click to expand...
Click to collapse
i bought my mobile from France so i download this rom
I9505XXUBMEA_I9505OXXBMF1_XEF MAIN
which i download from sammobile.com
Ohhh gotcha
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4
I was actually wondering... If I'm network locked and I flashed a new stock ROM, would it remove the network lock? I don't think it will, but just want to confirm and to know the rationale behind all of it. I was thinking of rooting my S4 to get it to downgrade and have the network lock removed, but don't know about all these things. A lot of threads mention rooting for custom firmwares but not rooting in order to remove network lock afterwards.
Sent from my GT-I9505 using Tapatalk 4
ladyhaly said:
I was actually wondering... If I'm network locked and I flashed a new stock ROM, would it remove the network lock? I don't think it will, but just want to confirm and to know the rationale behind all of it. I was thinking of rooting my S4 to get it to downgrade and have the network lock removed, but don't know about all these things. A lot of threads mention rooting for custom firmwares but not rooting in order to remove network lock afterwards.
Sent from my GT-I9505 using Tapatalk 4
Click to expand...
Click to collapse
Flashing any rom will not remove the network lock... but it can brick ur phone if u flashed a rom that is not intended for ur phone, if u want to get it unlocked ur best option for that is call ur current carrier to get the unlock code, it could cost u for the code but thats about the only way besides rooting and trying to unlock it that way after root.
Sent from my SAMSUNG-SGH-I337 using Tapatalk 4
I've unlocked my phone using an unlock code with one of those websites. It's a success. No problems. The problems I encountered recently had to do with the defective battery that came with my S4. What I'm curious to know now is if I can flash a ROM from my country where I got my phone... Just to make it like an unbranded phone. This is because when I boot up my phone, I see my carrier's logo and one of the wallpapers they replaced with their carrier logo as well. It's pretty annoying... So I wonder if I can flash a non-carrier unbranded ROM from my country to my phone. And do ai need to root to do so?
Sent from my GT-I9505 using Tapatalk
My device:
At&t Galaxy S4 (US)
4.2.2 (Google Play Version)
SGH-i337
Baseband: XXXXXXXXMF3
From What I understand, it can't be unlocked for t-mobile and whatnot. I've been searching around today for a couple hours, and doesn't look like there is a working method anymore
When trying through *#0011#, pressing "1" doesn't bring up a second menu; the menu stays the same.
Unlock codes won't work because device is Region locked (I'm in the US)...
That is what I found while searching around today...
Any advice would help. I can't for the life of me find a thread that fits my description. They're all just general gs4 unlock guides from months ago...
Looking around I couldn't find someone actually post this, so I asked. Sorry if its a repeat?
So have you acquired the unlock code to know they don't work.
sent from a I337 MF3 S4
I found a guide to rooting MF3 Not sure if rooting it will help?:
http://forum.xda-developers.com/showthread.php?t=2387577
Will try to root it first....
Then see what changes in the menu...
Click Here To Win said:
I found a guide to rooting MF3 Not sure if rooting it will help?:
http://forum.xda-developers.com/showthread.php?t=2387577
Will try to root it first....
Then see what changes in the menu...
Click to expand...
Click to collapse
Rooting isn't going to make any difference, but give it a try if it makes you feel better.
If you have a ATT phone you want Sim unlocked than the code you get from ATT will work if you want to use it with
T-mobile. (Same US region)
There is an app on playstore that will region unlock the phone but it is not a Sim unlock app.
sent from a I337 MF3 S4
You mind letting me know what you did, so I can copy your steps?
I'd much rather do that than following the generic guides...
Click Here To Win said:
You mind letting me know what you did, so I can copy your steps?
I'd much rather do that than following the generic guides...
Click to expand...
Click to collapse
I did the menu unlock and it was successful for me when I was on MDL.
I'm MF3 now and because I did it before it is permanently Sim unlocked.
Region lock away v1.0 on playstore.if the playstore don't bring it up than Google search it.
sent from a I337 MF3 S4
Yeah, I found out about that one...
It's not a SIM unlock though... So there isn't a way for me to unlock it yet that I've found.
You are rather confusing to me cause the sim and region unlock are the only two things you can unlock on this phone.if you have been talking about unlocking the bootloader than your heading is correct.
" NO UNLOCK FOR S4 "
now even if your bootloader was unlocked it has nothing to do with your sim or region and the ability to use it on a network that's in the same region as your phone currently.
sent from a I337 MF3 S4
Please read forum rules before posting
Questions and Help issues go in Q&A and Help section
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator
Sorry not trying to sound confusing.
I'm trying to unlock my mf3 Galaxy s4 for t-mobile. in the US. Don't need region unlock. (unless this makes it work on tmobile in the US?)
I've trying unlocking the phone through ATT customer service, but they can't/won't.
That's all I know so far...
U mentioned something about the region.if your phone is the i337 ATT branded/model phone keep calling ATT and lie to them that you need the unlock code for your phone cause you plan on going out of the country on the coolest vacation ever and it is cheaper for you to acquire a foreign sim card and you need the code for the sim to work.
sent from a I337 MF3 S4
I factory unlock phones as kind of a side job and all AT&T servers have changed their unlocking so it's extremely hard if not impossible to get the unlock through AT&T. You can still get a manufacturer unlock but it's pricey.
Ok I'm not understanding this... So if I get Region Unlock from the google play store will it make me be able to use any SIM card inside US?
And also where can I find a manufacture unlock?
And If all else fails is there alternate options?
Click Here To Win said:
Ok I'm not understanding this... So if I get Region Unlock from the google play store will it make me be able to use any SIM card inside US?
And also where can I find a manufacture unlock?
And If all else fails is there alternate options?
Click to expand...
Click to collapse
Its just a region unlock you still have to sim unlock it.
I understand now why its so hard for you to just call ATT for the unlock code cause its not your phone.there is no nifty little trick anymore . someone mentioned a way to mod the system to get the service menu back but it is work.GOOGLE/SEARCH
sent from a I337 MF3 S4
No, i tried calling att several times. They keep telling me I need to have it on contract for 6 months before I can have it unlocked. I dont have that time...
Every other way doesnt work for me...
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Thanks that what was I was wondering.... theres got to be a work around for mf3 users....
Id much rather do it through att, but because of their new rules I cant.
Im fairly new to android, accustomed to the easy ios exploiting, so thats why I asked so many things.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click Here To Win said:
Thanks that what was I was wondering.... theres got to be a work around for mf3 users....
Id much rather do it through att, but because of their new rules I cant.
Im fairly new to android, accustomed to the easy ios exploiting, so thats why I asked so many things.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
I think if all else fails, you can just buy the unlock code.
I've been reading the unlock thread and it seems you can get "Unlock your Galaxy S4" by unlockunit from the play store to unlock it.
Haven't tried it personally as my phone is in the mail...but I'm hoping it is a non MF3 and easy to unlock phone.
A lot to hope for, I know
http://forum.xda-developers.com/showthread.php?t=2282683
Never mind guy, I got it working wihth unlockunit app.... finally gave in and paid $25 for it......
Good to hear.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Hi i have ATT GALAXY S4 with baseband MJ9, am wondering if i can downgrade baseband or something to be able to sim unlock the phone
or if there is a cure for this, am kind of a noob, plus if anyone has ideas then should help me figure this out, at&t is not able to unlock this phone and i'll have to get ahold of the owner tomorrow, but am a little impatient and i also like to learn
i tried region lock away but it still wont unlock
hidden menus dont take me to where the instructions say
i've had an s4 with mf3 and i unlocked it just fine and easy
please help a noob. thanks
You can't downgrade, at least on the att gs4
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
troolplay said:
Hi i have ATT GALAXY S4 with baseband MJ9, am wondering if i can downgrade baseband or something to be able to sim unlock the phone
or if there is a cure for this, am kind of a noob, plus if anyone has ideas then should help me figure this out, at&t is not able to unlock this phone and i'll have to get ahold of the owner tomorrow, but am a little impatient and i also like to learn
i tried region lock away but it still wont unlock
hidden menus dont take me to where the instructions say
i've had an s4 with mf3 and i unlocked it just fine and easy
please help a noob. thanks
Click to expand...
Click to collapse
Here is your choice, but if you unlock sim card already it will never be lock again.
alfmetal said:
You can't downgrade, at least on the att gs4
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
well can i atleast unlock my phone with some hidden menus?
or maybe a reasonable price unlocking services?
troolplay said:
well can i atleast unlock my phone with some hidden menus?
or maybe a reasonable price unlocking services?
Click to expand...
Click to collapse
You can try with hidden menu or use this guys : CELLUNLOCKER
Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
TNKid said:
Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
Click to expand...
Click to collapse
MK2 owner can't unlock bootloader for now
TNKid said:
Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
Click to expand...
Click to collapse
Are you trying to sim unlock? If so you could try this http://forum.xda-developers.com/showthread.php?p=49068262
Sent from my Nexus 5 using XDA Free mobile app
I'm trying to make straight talk from an at&t phone. I don't care about the rom. I have the byob sim card do I still need to do the sim unlock?
jd1639 said:
Are you trying to sim unlock? If so you could try this http://forum.xda-developers.com/showthread.php?p=49068262
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
TNKid said:
I'm trying to make straight talk from an at&t phone. I don't care about the rom. I have the byob sim card do I still need to do the sim unlock?
Click to expand...
Click to collapse
You should only have to change your APN settings
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
How would I know if my boot loader is unlocked though, doesn't it have to be?
TNKid said:
How would I know if my boot loader is unlocked though, doesn't it have to be?
Click to expand...
Click to collapse
I can tell you for sure your boot loader is not unlocked. You can't unlock it on the i337. But it doesn't have to be to change the apn
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
jd1639 said:
I can tell you for sure your boot loader is not unlocked. You can't unlock it on the i337. But it doesn't have to be to change the apn
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
Click to expand...
Click to collapse
Ok trying to sim unlock now. Will let ya know how it goes
TNKid said:
Ok trying to sim unlock now. Will let ya know how it goes
Click to expand...
Click to collapse
You probably don't have to sim unlock. Straight talk is part of att isn't it?
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
jd1639 said:
You probably don't have to sim unlock. Straight talk is part of att isn't it?
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
Click to expand...
Click to collapse
It was a contract phone so I dunno. I got the apn setting e-mailed to me by straight talk, I dunno? I think its the modem but i'm not sure which one excatly I need.
TNKid said:
It was a contract phone so I dunno. I got the apn setting e-mailed to me by straight talk, I dunno? I think its the modem but i'm not sure which one excatly I need.
Click to expand...
Click to collapse
I have the regional app and root with safe strap 3.71. I used terminal emulator and check which modem I needed and it says nb1 so I tried that and nothing different. what am I not doing or doing wrong.
TNKid said:
I have the regional app and root with safe strap 3.71. I used terminal emulator and check which modem I needed and it says nb1 so I tried that and nothing different. what am I not doing or doing wrong.
Click to expand...
Click to collapse
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that works.
rickxx2000 said:
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that it works.
well i have and I tried flashing the MF3 modem and it still tells me I have no mobile networks or whatever. I'm on a att straight talk sin card as well. My system is nb1 rooted to mk2 I thought I had to down grade for root so that's what indid. If I take this update I will lose root if I go back to 4.4.2 won't I
Click to expand...
Click to collapse
rickxx2000 said:
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that works.
Click to expand...
Click to collapse
Also: I have tried numerous APNs and none worked. I seen a post that said something about flashing a modem or something using Loki but I lost the page. Maybe I missed a step?
TNKid said:
Also: I have tried numerous APNs and none worked. I seen a post that said something about flashing a modem or something using Loki but I lost the page. Maybe I missed a step?
Click to expand...
Click to collapse
can I use an nb1 modem if i;m using a mk2 rom?
TNKid said:
can I use an nb1 modem if i;m using a mk2 rom?
Click to expand...
Click to collapse
i believe you can. there's a straight talk thread in the general section http://forum.xda-developers.com/showthread.php?t=2273527
you may want to post your question there. sorry i couldn't be more help
rickxx2000 said:
i believe you can. there's a straight talk thread in the general section http://forum.xda-developers.com/showthread.php?t=2273527
you may want to post your question there. sorry i couldn't be more help
Click to expand...
Click to collapse
Ended up switching to a t mobile sim card. I figured since it's a att phone to use the att sim card.. but I tried the t mobile and getting some service but very little. ST is telling me a tower near me is down to give it 24 hours but I feel that's a goose chase lol I've used a t mobile sim card in the exact spot I'm in and worked fine. It was in the note 2 from Verizon fully unlocked though.
TNKid said:
Ended up switching to a t mobile sim card. I figured since it's a att phone to use the att sim card.. but I tried the t mobile and getting some service but very little. ST is telling me a tower near me is down to give it 24 hours but I feel that's a goose chase lol I've used a t mobile sim card in the exact spot I'm in and worked fine. It was in the note 2 from Verizon fully unlocked though.
Click to expand...
Click to collapse
I have a at&t locked s4 on straightalk now. No need to root unlock or anything just the at&t compatible sim from them and adjust apns. I can't advise on the tmobile base for st since there coverage is horrid in my area but if you do use the at&t the apn I use for my s4 and my gf s4 is as follows
apn:tfdata
port:80
mmsc:http://mms-tf.net
mm proxy:mms2.tracfone.com
mm port:80
anything not listed above was left as either not set or whatever the default was when creating a new apn. I have no issues with data or mms using this apn on either phone. Hope that helps
drivers1492 said:
I have a at&t locked s4 on straightalk now. No need to root unlock or anything just the at&t compatible sim from them and adjust apns. I can't advise on the tmobile base for st since there coverage is horrid in my area but if you do use the at&t the apn I use for my s4 and my gf s4 is as follows
apn:tfdata
port:80
mmsc:http://mms-tf.net
mm proxy:mms2.tracfone.com
mm port:80
anything not listed above was left as either not set or whatever the default was when creating a new apn. I have no issues with data or mms using this apn on either phone. Hope that helps
Click to expand...
Click to collapse
Well they told me a tower was down for t mobile yesterday and they said 24 hours and it's still not hardly working. I can only use my gs4 on my couch with my hand near the window. About to call them and get I in their butt. It's not my phone is the apn settings or something on the ST end. Will update after this long as call
Unless I am mistaken the apn has zero to do with reception. Apn's are for your mms/data access. I have never come across a phone where the apn had any effect on the actual cellular signal.