S7 Edge permanently locked to AT&T network (Too many network unlock code attempts)
Hello all!
I've moved to Korea with my fully purchased AT&T S7 Edge (SM-G935A) from the U.S. I went to a local authorized phone service shop in Korea and purchased and linked an SK Telecom Nano USIM 3GB data sim card to my phone and then entered in too many unsuccessful network unlock code attemps. I wasn't aware that if too many failed attempts are entered, that the phone would lock permanently to AT&T network :/.
I then contacted AT&T and got the official authorized network unlock code, but that isn't working. Neither did the unfreeze code I purchased from an unlocking site. I then found the XDA forum and successfully flashed my phone to G-935U (http://forum.xda-developers.com/att-s7-edge/how-to/updated-935u-935a-live-links-pi3-t3501686). After inserting the prepaid Sim card, I'm still receiving the network unlock code screen where the AT&T network unlock code, unfreeze code, and codes on Sim card packaging are not working.
Can anyone advise any solutions? Is there a way to reset or get around the hardlock / permanently AT&T network lock?
Thank you,
Skype - ronrambokim
I have had hard locked phones before, here's how you can get it fixed. If its still under warranty, and if you can get it to samsung usa, tell them your phone is stuck due to a bad update. They will reflash your phone, and when they do this, with their methods, it restores the modem firmware and the original sim's lock(no more hard lock). & they will reprogram your imei and serial. So your unlock codes will work now.
delete
I have an edge that is unlocked by tmobile.. in the app, permanent unlock (tmobile unlock app), it says.. "unlock failed" but below says permanently unlocked, unlock approved.. my understanding is this is a normal message.
When i went to the ATT store to test a sim.. they use their live sim, put it in, try to make a phone call but simply said it didnt work, isnt unlocked, which i dont think is right.. issue is i didnt see what if any error message there was.
Is there some step that the att rep should have done to get this on the att network besides putting it in the phone?
Thanks in advance for any info
edit: appears a special sim is needed, at least according to an online rep.. i was told to have them look up the IMEI with the MyCSP tool in the store to determine which sim.
VERIZON SAMSUNG GALAXY S4 using Canadian SIM says "This SIM card is not from Verizon"
Hi everyone, it's my first time posting..
I have a Galaxy S4 from Verizon that has been factory reset. I inserted my Freedom Mobile SIM and the setup wizard says: "this SIM card is not from Verizon wireless."
Gives three options:
Emergency Call
Turn phone off
Use WiFi
Trying to use the phone does not work.
I followed some instructions online to unlock the phone for free but upon using the dial option it says : "connection problem or invalid MMI code"
None of the codes worked even the one to obtain the IMEI. I can locate the IMEI but I just wanted to try this way to see what happens..
I had the person who gave me the phone contact Verizon for an unlock code and they said that the phone was unlocked and to call Samsung. Samsung said to call Verizon and for the last time...Verizon said it's unlocked.
Is there a way to fix this? Is my SIM card maybe the problem?
The SIM was working fine in my unlocked phone before it broke but I did have some issues before it was working and I was told to get it replaced to fix the issues but I didn't end up doing that since they were resolved on their own.
Are you sure the Verizon s4 is network unlocked and supports Freedom's aws frequencies?
Verizon said they were sure..
Hi All - hoping to get your help and advice.
Original S8 was a USA SM-G950U on T-Mobile that was successfully flashed and unlocked to SM-G950U1 (CSC = XAA). The phone was fully functional, successfully received OTA updates and was on the latest firmware (G950U1UES5CRL2) in use in Hong Kong (3HK 4G LTE) until yesterday when I did a hard-reboot and cache-wipe a few days after a system update and now the cellular radio won't connect to any network. I've tested the SIM card (works fine on other phones), rebooted without the SIM inside (no impact), tried upgrading to Android 9.0 as well as older Bootloader v5 firmware to see if the cellular radio would turn on and re-connect but no luck.
Current State: When looking under "Mobile networks", Network mode shows "Preferred network mode: CDMA/EVDO/GSM/WCDMA" whereas it used to be "LTE/3G/2G". This option is available under the drop down list but I can't selected it. Under "Network Operators", tapping "Search networks" results in an error "Error while searching for networks". Tapping "Select automatically" pops an error "Unable to connect. Try later".
After exhaustive testing, it feels like the phone is behaving like it's SIM-locked since everything else works thru wifi but it's on the SM-G950U1 XAA unlocked firmware so it shouldn't be locked?? Any suggestions would be greatly appreciated.
eyecee said:
Hi All - hoping to get your help and advice.
Original S8 was a USA SM-G950U on T-Mobile that was successfully flashed and unlocked to SM-G950U1 (CSC = XAA). The phone was fully functional, successfully received OTA updates and was on the latest firmware (G950U1UES5CRL2) in use in Hong Kong (3HK 4G LTE) until yesterday when I did a hard-reboot and cache-wipe a few days after a system update and now the cellular radio won't connect to any network. I've tested the SIM card (works fine on other phones), rebooted without the SIM inside (no impact), tried upgrading to Android 9.0 as well as older Bootloader v5 firmware to see if the cellular radio would turn on and re-connect but no luck.
Current State: When looking under "Mobile networks", Network mode shows "Preferred network mode: CDMA/EVDO/GSM/WCDMA" whereas it used to be "LTE/3G/2G". This option is available under the drop down list but I can't selected it. Under "Network Operators", tapping "Search networks" results in an error "Error while searching for networks". Tapping "Select automatically" pops an error "Unable to connect. Try later".
After exhaustive testing, it feels like the phone is behaving like it's SIM-locked since everything else works thru wifi but it's on the SM-G950U1 XAA unlocked firmware so it shouldn't be locked?? Any suggestions would be greatly appreciated.
Click to expand...
Click to collapse
Just because you flash unlocked firmware does not remove the T-Mobile SIM lock
TheMadScientist said:
Just because you flash unlocked firmware does not remove the T-Mobile SIM lock
Click to expand...
Click to collapse
Thanks for your feedback! What's strange was that my S8 with the unlocked firmware (SM-G950U1) was working perfectly for 6 months and I was able to make calls, get LTE data connectivity, etc. Now the phone is still working via wifi but the cellular function is dead. Any suggestions or advice on how to remove the T-Mobile SIM lock?
eyecee said:
Thanks for your feedback! What's strange was that my S8 with the unlocked firmware (SM-G950U1) was working perfectly for 6 months and I was able to make calls, get LTE data connectivity, etc. Now the phone is still working via wifi but the cellular function is dead. Any suggestions or advice on how to remove the T-Mobile SIM lock?
Click to expand...
Click to collapse
We need to verify some how if it truly is Sim locked or not first.
TheMadScientist said:
We need to verify some how if it truly is Sim locked or not first.
Click to expand...
Click to collapse
I've tried 2 different SIM cards (though both from the same carrier) and both were not connecting to the mobile network. The phone can detect when there isn't a SIM card inserted so that is a minor indicator that the SIM card slot is functional.... any other suggestions on how to verify whether my S8 is SIM locked?
EDIT: Both SIM cards work in other phones (iPhone6s, iPhoneX).
eyecee said:
I've tried 2 different SIM cards (though both from the same carrier) and both were not connecting to the mobile network. The phone can detect when there isn't a SIM card inserted so that is a minor indicator that the SIM card slot is functional.... any other suggestions on how to verify whether my S8 is SIM locked?
EDIT: Both SIM cards work in other phones (iPhone6s, iPhoneX).
Click to expand...
Click to collapse
Of coarse not always but most of the time it will display a warning or something about sim not accepted. This sounds like to me. A couple things. Simlocked. Maybe install the T-Mobile firmware again and try the T-Mobile unlock app. It should say this device is already unlocked or successful. If that passes. It could be a disabled band or something. Sounds like the latter. Like it's not picking up your carriers signal. Again the us models I believe are pretty universal so maybe a different firmware may enable it again. Or last the device has somehow become blacklisted which unfortunately I have seen plenty of people here in US sell devices still on contract maybe pay a few months and quit then blacklists
eyecee said:
Hi All - hoping to get your help and advice.
Original S8 was a USA SM-G950U on T-Mobile that was successfully flashed and unlocked to SM-G950U1 (CSC = XAA). The phone was fully functional, successfully received OTA updates and was on the latest firmware (G950U1UES5CRL2) in use in Hong Kong (3HK 4G LTE) until yesterday when I did a hard-reboot and cache-wipe a few days after a system update and now the cellular radio won't connect to any network. I've tested the SIM card (works fine on other phones), rebooted without the SIM inside (no impact), tried upgrading to Android 9.0 as well as older Bootloader v5 firmware to see if the cellular radio would turn on and re-connect but no luck.
Current State: When looking under "Mobile networks", Network mode shows "Preferred network mode: CDMA/EVDO/GSM/WCDMA" whereas it used to be "LTE/3G/2G". This option is available under the drop down list but I can't selected it. Under "Network Operators", tapping "Search networks" results in an error "Error while searching for networks". Tapping "Select automatically" pops an error "Unable to connect. Try later".
After exhaustive testing, it feels like the phone is behaving like it's SIM-locked since everything else works thru wifi but it's on the SM-G950U1 XAA unlocked firmware so it shouldn't be locked?? Any suggestions would be greatly appreciated.
Click to expand...
Click to collapse
Have the same problem, have SM-G950U TMB Bad ESN , get Unlock/Unfreeze codes from support T-Mobile, easy unlock FRP, unlock phone througt codes, can't unlock network througt T-Mobile app, use samtool - unlock network shows TMB/XAA/TMB, after restart phone are can't see network, can't find network, with signal all ok and in other phones all ok with sim. Try to change SCS to XAA -> can't find network, try flash SM-G950U1 latest frim -> Not working, Try Flash SM-G950U TMB Latest - Model/Network status wrong... odin error... , Now can't flash any SM-G950, only SM-G950U1XXXXXX , try 950U1 TMB not work, and trying many SPR,XAS,XAA,VZN ... in all frimwares network don't work. now don't know what to do, possible i will try to flash SM-G950F
Nirexes said:
Have the same problem, have SM-G950U TMB Bad ESN , get Unlock/Unfreeze codes from support T-Mobile, easy unlock FRP, unlock phone througt codes, can't unlock network througt T-Mobile app, use samtool - unlock network shows TMB/XAA/TMB, after restart phone are can't see network, can't find network, with signal all ok and in other phones all ok with sim. Try to change SCS to XAA -> can't find network, try flash SM-G950U1 latest frim -> Not working, Try Flash SM-G950U TMB Latest - Model/Network status wrong... odin error... , Now can't flash any SM-G950, only SM-G950U1XXXXXX , try 950U1 TMB not work, and trying many SPR,XAS,XAA,VZN ... in all frimwares network don't work. now don't know what to do, possible i will try to flash SM-G950F
Click to expand...
Click to collapse
You can't fish 950f different chipsets. What country are you trying to use it in. If it's blacklisted that's more than likely your answer right there.
TheMadScientist said:
You can't fish 950f different chipsets. What country are you trying to use it in. If it's blacklisted that's more than likely your answer right there.
Click to expand...
Click to collapse
Yeah can't flash 950F, Russia - No T-Mobile here. Don't know what to try right now, possible try get stock TMB, then unlock network again if its lock. No blacklists, T-Mobile support says status Clear, but maybee contract on T-Mobile not paid. Trying to flash custom modem, but didn't help too.
Stats here:
ADBSN: 98892A415243565036
MODEL NAME: SM-G950U1
DID: 205E7D06ED39
BOOTLOADER: G950U1UES7DSK4
PDA VERSION: G950U1UES7DSK4
MODEM VERSION: G950U1UES7DSK4
CSC VERSION: G950U1UES7DSK4
MODEM BOARD: MSM8998
ANDROID VERSION: 9
CARRIER: XAA
SALE COUNTRY: USA
CPU: QCOM
SIM STATE: LOADED
SIM CONFIG: SS
USB CONFIG: MTP,ADB
Warranty Bit: 0
USB Modem Connection Detected!
Model Name: SM-G950U1
IMEI: 355987081639857
SN: R28J41FBDBJ
UID: 98892A415243565036
SWVER: G950U1UES7DSK4/G950U1UES7DSK4/G950U1UES7DSK4/G950U1UES7DSK4/G950U1OYM7DSK4
Sorry if this is posted somewhere, but I could not locate it. I bought a consumer cellular SM-J737U, which runs on att and tmobile towers. When I inserted the t-mobile sim, it prompted me to reboot for network change. I did, and I have full LTE for a few seconds then I got an error message saying this is an invalid sim, contact consumer cellular for help. So I know the sim works because I had full connectivity on there.
What do I need to flash to goto stock J7 stuff so I can use my tmobile sim?
I tried another sim and the same thing happened.