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[Q] Help Requested > Samsung Galaxy S4 , SGH-i337 AT&T Sim Unlock (Sim not Allowed) !
Hey guys I'm not aware much into upgrading rooting flashing etc my phone might be region locked when I insert sim it says Sim not Allowed at some Sim cards says sim not inserted on differet sim operators founds it but wont work properly cant dial cant do anything I've searched and read everywhere but I CANT SEEM TO FIND exact info for my model
Please Direct me to I need to root and region unlock it I really don't know what should I do
Device: SAMSUNG-SGH-I337 I have some AT&T applications I think it matters if it's AT&T or not
Android Version: 4.2.2 (I did hard reset it was 4.2.2 and still is)
Baseband Version: I337UCUAMF3
Kernel Version: 3.4.0-812098
Build Number JDQ39.i337ucuamf3
Selinux Status Permissive
Secure boot status Type: Samsung
actlover said:
Hey guys I'm not aware much into upgrading rooting flashing etc my phone might be region locked when I insert sim it says Sim not Allowed at some Sim cards says sim not inserted on differet sim operators founds it but wont work properly cant dial cant do anything I've searched and read everywhere but I CANT SEEM TO FIND exact info for my model
Please Direct me to I need to root and region unlock it I really don't know what should I do
Device: SAMSUNG-SGH-I337 I have some AT&T applications I think it matters if it's AT&T or not
Android Version: 4.2.2 (I did hard reset it was 4.2.2 and still is)
Baseband Version: I337UCUAMF3
Kernel Version: 3.4.0-812098
Build Number JDQ39.i337ucuamf3
Selinux Status Permissive
Secure boot status Type: Samsung
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Click to collapse
AT&T phones are network locked. Not region locked. I used my S4 (with roaming on) in UK, Canada, Penama, Korea, Thailand where AT&T local network is available. To use local network or other network, your phone need to be network (sim) unlocked.
sway8966 said:
AT&T phones are network locked. Not region locked. I used my S4 (with roaming on) in UK, Canada, Penama, Korea, Thailand where AT&T local network is available. To use local network or other network, your phone need to be network (sim) unlocked.
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can you direct me are there any guides or perhaps u might know what should I do
Contact att to see about getting a free unlock code.
audit13 said:
Contact att to see about getting a free unlock code.
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Click to collapse
the thing is att it's in America i'm in Bulgaria
That should not matter. Contact them via email?
actlover said:
can you direct me are there any guides or perhaps u might know what should I do
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I am an AT&T user for 20 years and AT&T always deny to give me the network unlock code. They do provide the network unlock code for the iphone users if they the phone was already paid off (after 2 years contract).
When I asked the network unlock code for my previous AT&T phones, (nokia, LG, HTC) AT&T told me to use the AT&T roaming network and they put me on the worldwide roaming program.
When I tried to unlock my S4 i337, AT&T asked me to go to a link for the unlock instruction but S4 was not listed in there. AT& T told me that if the phone is not listed they could not provide the unlock code.
I end up using cellunlocker.net for all my phones network unlocking. It cost about US$ 30.00 .
You can try to request unlock code from AT&T first at www.att.com. Explain to them about your situation. They might help you. If they denied, just use the paid service like I did.
If AT&T doesn't provide a free unlock code, try ebay.
http://forum.xda-developers.com/showthread.php?t=2514607
Sent from my A0001 using Tapatalk
The free method seems to work on very old bootloaders and modems.
I've looked all over the forums and all the threads on carrier switching refer to switching US S8 variants to US carriers.
Can someone please explain or point me to a thread that explains how to carrier switch Canadian providers that would be fantastic. In particular I want to go from Rogers to Freedom Mobile (aka wind mobile) . My phone has been factory unlocked.
howellinmad said:
I've looked all over the forums and all the threads on carrier switching refer to switching US S8 variants to US carriers.
Can someone please explain or point me to a thread that explains how to carrier switch Canadian providers that would be fantastic. In particular I want to go from Rogers to Freedom Mobile (aka wind mobile) . My phone has been factory unlocked.
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Click to collapse
I can tell you from experience that freedom does not have any carrier specific features, so doing a firmware switch wont benefit you in any way I dont think.
You can however go onto sammobile and download the firmware for freedom and flash it using Odin. Again probably no real benefits. You would benefit if you were going the other way tho, as Rogers, Bell and Telus have carrier specific settings in their firmwares.
But since you are carrier unlocked, you could try a factory reset then put your freedom sim in it and boot up. It might install the freedom files. My S7 worked this way when i went from a Bell locked phone to a Koodo sim...
Edit: That link has an unlocked canadian firmware as well, you could use that firmware too.
Open the dialer and type *#243203855# then select GLW, this will change your csc to wind mobile/freedom, it'll wipe your phone..
peachpuff said:
Open the dialer and type *#243203855# then select GLW, this will change your csc to wind mobile/freedom, it'll wipe your phone..
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Hi Peachpuff. I have an unlocked S8 phone from a Bestbuy canada marketplace seller. I tried using your code to change to the Telus CSC so I can get VOLTE but got the invalid MMI code error message. The about phone says its an SM-G950FD, and the only code the phone appears to accept is the one displaying the EMEI.
Hope you have some guidance on that ?
Thanks
starview332 said:
Hi Peachpuff. I have an unlocked S8 phone from a Bestbuy canada marketplace seller. I tried using your code to change to the Telus CSC so I can get VOLTE but got the invalid MMI code error message. The about phone says its an SM-G950FD, and the only code the phone appears to accept is the one displaying the EMEI.
Hope you have some guidance on that ?
Thanks
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Click to collapse
That's not a canadian s8, its an international one, so that code won't work and i doubt you'll get volte working at all.
Just enjoy your root friendly multi sim phone.
hey there.
so short version.
i got a sprint s7, apparently it was not carrier unlocked when i got it. sprint says they will only unlock it if it's on an active service in good standing which i dont plan on getting on sprint at all. so i need a trusted place to get the unlock codes for it please, the cheaper the better because of my situation.
longer version.
my dad has early onset dementia so we had to take his phone from him and close his account. it's been a while and i found his S7 sitting there not doing anything and i need a new phone to put on my Verizon prepaid plan so after looking on the s7 the hardware is all the same just the firmware blocks out whichever bands each carrier chooses. so i need to go tomorrow and get one of Verizon sims to be ready so when i get the unlock code i can put it in right away and make sure i dont receive that sim error. or do i need to flash to the verizion firmware before i try to carrier unlock it?
any and all help is really appreciated as our family is really struggling atm and not having to purchase a new phone would save us alot of money.
p.s. device info is sm-g930p
baseband g930pvps4bqc1
android version 7
Here's a link to the remote unlocking service I used to have my 930P unlocked: https://www.gsmzambia.com/product/samsung-sprint/
You'll have to install Teamviewer and let them remotely control your PC to perform the unlock. I found them to be very reputable and helpful before, during and after the sale.
After unlocking, I'd recommend using Odin (https://www.androidfilehost.com/?fid=24591023225177749) to flash the "U" firmware: http://updato.com/firmware-archive-select-model?record=52EF42AE925C11E7963AFA163EE8F90B
With U firmware, you won't have any of the Sprint bloatware that came preloaded on the phone, and it'll automatically detect and apply the proper settings for whichever SIM card you insert. If you don't want to flash alternate firmware, you can stick with what's already on the phone; you'll just have to manually enter the Verizon APN settings.
Hi .
I have bought a S8 locked to US Cellular on eBay, clean , not blacklisted and when I try a SIM card from my operator does not ask for unlock pin code and remains without registering on my network.
Does anyone know any website or any method to unlock It?
Many thanks in advance.
qryche said:
Hi .
I have bought a S8 locked to US Cellular on eBay, clean , not blacklisted and when I try a SIM card from my operator does not ask for unlock pin code and remains without registering on my network.
Does anyone know any website or any method to unlock It?
Many thanks in advance.
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Click to collapse
Does it have a unlock app in apps drawer or in settings. It may be unlocked. If ure sim works. WhT carrier you on.
Thanks for your answer.
I live in Portugal and I tried 2 different SIM cards. The phone shows in upper left screen the message "SIM blocked". I searched for an unlock app too but I can't find any like in T-Mobile phones I bought in the past.
US Cellular is a CDMA network provider whereas in Portugal you probably have only GSM networks.
I think you should look into this and investigate this issues as well.
Another info: I flashed with Odin with the latest USC official Rom from sammobile. Can be this the cause?
This is 950U version and therefore has the GSM frequencies as well.
Even if it was only cdma it would prompt to insert the network unlock code....
Any help?
WHen I put a sim card it appears a forbidden sign on the top, where I should see the network signal...
https://www.youtube.com/watch?v=yysQbPLf8l0&feature=youtu.be
I bought this supposedly T-Mobile H918 on ebay. It says it works with T-mobile, Lycamobile, UltraMobile, Simplemobile. I figured (assumed (mistake)) the phone was unlocked. Tried to use a Freedompop gsm sim, no go. Went over to T-mobile they said it was NOT in database, couldn't unlock a phone not in database.but rep put his Tmobile sim in and it worked. I decided to order a T-mobile sim online for $10. In the meantime I went online looking for a LG IMEI checker. It turns out the phone is an Israeli H990. I guess someone flashed the T-mobile H918 on it. The IMEi is clear according to swappa and others. Should I send it back? It had H918 10K on it and I flashed back to 10J and rooted. I like the phone, but is it possible that it could get blocked down the line? If it's clear and can be used on different T-mobile MVNOs is it unlocked? I plugged IMEI into AT&T checker and it said something like, it's clear, we just need to get the right sim. Any help or info or ideas appreciated, Thanks Johnm
jmacie said:
I bought this supposedly T-Mobile H918 on ebay. It says it works with T-mobile, Lycamobile, UltraMobile, Simplemobile. I figured (assumed (mistake)) the phone was unlocked. Tried to use a Freedompop gsm sim, no go. Went over to T-mobile they said it was NOT in database, couldn't unlock a phone not in database.but rep put his Tmobile sim in and it worked. I decided to order a T-mobile sim online for $10. In the meantime I went online looking for a LG IMEI checker. It turns out the phone is an Israeli H990. I guess someone flashed the T-mobile H918 on it. The IMEi is clear according to swappa and others. Should I send it back? It had H918 10K on it and I flashed back to 10J and rooted. I like the phone, but is it possible that it could get blocked down the line? If it's clear and can be used on different T-mobile MVNOs is it unlocked? I plugged IMEI into AT&T checker and it said something like, it's clear, we just need to get the right sim. Any help or info or ideas appreciated, Thanks Johnm
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If you were able to root it, then its probably a database mismatch. The gsm simcards usually pose problem to T-Mobile's android handsets due to UICC activation (or UICC unlocking).
A crossflashed phone is hardbricked the moment u unlock its bootloader and load a custom recovery on it. (Had my chinese fake G3/G2 moments back in the days). Your phone is fine if you rooted it and its working right out of the box.
Two things that dont work if u modify the system of LG phones is RIL and the abnormal screen behavior. For your case, both work. I'm from Pakistan but I often end up having unlocked phones from American carriers. Right now I have Samsung Tab A which is from T-Mobile and UICC activation doesnt make my LTE Sim work on it. With T-Mobile its kinda common to end up into an "invalid sim card" error when u try to use a non-T variant.
dark_prince said:
If you were able to root it, then its probably a database mismatch. The gsm simcards usually pose problem to T-Mobile's android handsets due to UICC activation (or UICC unlocking).
A crossflashed phone is hardbricked the moment u unlock its bootloader and load a custom recovery on it. (Had my chinese fake G3/G2 moments back in the days). Your phone is fine if you rooted it and its working right out of the box.
Two things that dont work if u modify the system of LG phones is RIL and the abnormal screen behavior. For your case, both work. I'm from Pakistan but I often end up having unlocked phones from American carriers. Right now I have Samsung Tab A which is from T-Mobile and UICC activation doesnt make my LTE Sim work on it. With T-Mobile its kinda common to end up into an "invalid sim card" error when u try to use a non-T variant.
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Wow Thanks, this story is getting more interesting. I appreciate you relating your crossflashing experience. I guess I'll try to get some different gsm sims to try. Thanks, take care, johnm