[Q] Weird problem with unlocked S4 LTE - Galaxy S 4 Q&A, Help & Troubleshooting

Hi! first poster here.
I've just got this phone wich was recently unlocked from TELCEL MEX carrier. The weird thing here is that the phone work flawlessly with any domestic carrier sim cards, but not with my US T-Mobile sim card.
I've test this T-mobile sim card with other unlocked phones (Galaxy S4 i9500 and Alcatel Pop) here in México without problem, but in the S4 above mentioned asks for sim unlock code.
The cell phone is SGH-I337M with KitKat 4.4.2. and firmware CSC code TCE
Thank you very much in advance!

This may be relevant or not.
My previous phone was an HTC Desire S on O2UK.
O2UK give you a free unlock on all contract phones after 6 months and send a code by email to you.
Any time I tried changing sims to a different carrier it asked for the unlock code, except when it was Tesco Mobile UK.
It may be that the original carrier requires you to input the unlock code for anything other than certain providers.
I tried to get an unlock code for my I9505 LTE but they said it was factory unlocked so can't speak about the phone specifically but with the Desire S, also on O2UK, had a similar issue.

I've got the pin code
Thanks for your input, sure it's relevant.
I have the unlock code for the T-mobile sim card, but of course it's not recognized by the phone (or sim card?)
In the other phones tested the process was straight forward, just inserted sim, boot up and voilá.
Went to the Telcel's service center but the person there confirmed that it's unlocked.
I'ven reading about a "Regional Lock" of some Samsung devices, but i realy can tell if this the case.
Anybody else having this kind of issue?

Region locking I don't believe has anything to do with this. When the phone was unlocked, the region locking should also have been removed.

Related

[Q] How to unlock Galaxy S4 SCH-R70 US Cellular

How to unlock the Samsung Galaxy S4 SCH-R970
I bough this phone online thinking that i will unlock and keep using on different carriers even outside the US (GSM)
I have done a lot of researches online and i cannot find any solution. The imei is only 14 Digits and almost all online unlocking services doesn't have this model.
The usually codes like *#0011#, *#27663368378# they doesn't work at all.
I have tried to go to unlock stores or guys who knows to unlock phones and he said that this phone cannot be unlocked.
phone has a sim card slot so it should be CDMA&GSM
When i insert a different sim card provider it says Invalid Sim Card so i cannot enter any unlock code
ANY IDEA or i will lose 500$ for bad phone
Uscc is not a gsm phone the sim card slot is used for thw 4g service the phone itself is cdma
Sent from my SCH-R970 using XDA Premium 4 mobile app
jtjames003 said:
Uscc is not a gsm phone the sim card slot is used for thw 4g service the phone itself is cdma
Sent from my SCH-R970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
??
Anyone know if its possible to unlock?
cynthiadx said:
??
Anyone know if its possible to unlock?
Click to expand...
Click to collapse
did you find a solution? i have th same problem but my phone is s3
jtjames003 said:
Uscc is not a gsm phone the sim card slot is used for thw 4g service the phone itself is cdma
Sent from my SCH-R970 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
you are wrong..when samsung fixed/made the phone give the phone all the feuatures..like thisphone can bee gsm and cdma phone..but uscc lock the gsm and they only want to use cdma..i contact samsung and they told me..all s4 models in every counrtys are same..but uscc lock the gsm network..now we have to 'brake' their lock or give us the unlock code..thatt all.. i also have the same promble..no solution yet..
SkilleR039 said:
How to unlock the Samsung Galaxy S4 SCH-R970
I bough this phone online thinking that i will unlock and keep using on different carriers even outside the US (GSM)
I have done a lot of researches online and i cannot find any solution. The imei is only 14 Digits and almost all online unlocking services doesn't have this model.
The usually codes like *#0011#, *#27663368378# they doesn't work at all.
I have tried to go to unlock stores or guys who knows to unlock phones and he said that this phone cannot be unlocked.
phone has a sim card slot so it should be CDMA&GSM
When i insert a different sim card provider it says Invalid Sim Card so i cannot enter any unlock code
ANY IDEA or i will lose 500$ for bad phone
Click to expand...
Click to collapse
Check this ##366633# the first code in dial app that works..even imei code dont work this code is going in one dm mode any ideas what is this?
Samsung gs4 sch-970c (cricket)
Samsung has told me this phone will work either gsm or cdma. Cdma is the way cricket first sold it. It cannot be unlocked. It is cdma. It has to be flashed to a new carrier after it is rooted. The sim is locked via software. Not many codes and all the unlock codes you read about are for gsm. The ##366633# code you mention gets you to a disable or enable developer mode.
i also have the same issue. Not resolved yet. but I did find out this that might help: if i pull up a website that checks the MEID number it gives me the whole description of my phone plus an extra digit on the IMEI number. I wonder if this is why third party unlock sites cant help me
Who has unlocked cricket sch-r970c?
Same problem. Cricket said they cannot find the unlock code if the phone was never activated. So this was never activated.
I have rooted it to OptimizedCM-12-1-20151130. Is it now unlocked?
OR, who has successfully flashed a custom ROM to unlock the software lock on it?
The struggle continues...
I just repaired my USC s4 LCD digitizer and now that I am no longer a USC customer wanted to unlock it so I did some checking, if you go to US cellular they will unlock the phone for you, I got my unlock code, but they said they couldn't complete the process if the phone was rooted (Which mine is), you would have to reinstall the USC original firmware, or the latest firmware, to get it to unlock, then root it. I am doing some research now to find out if there is indeed an alternative to unlock a rooted phone...
I just left US CELLULAR where I was told nothing below the s5 could be unlocked,and the only suggestion from any one employed there was to call customer service.
you try RegionLockapp ???
I unlocked my t mobile s4 with it, i had to flash to a earlier firmware, then root, then use RegionLockapp, then re-flash whatever rom you want.

[Q] sim unlocked in UK but locked for Malaysian sim

Hye all
i recently purchased a samsung galaxy s4. I can confirm that it is unlocked for UK network however when i put my malaysian sim card in it asked for a sim network unlock code. Anyone here know how is this possible and is there any way that i can unlock this?
It is worth noting that on the box of the phone it says
European model.
this product is only compatible with SIM card issued from a mobile operator within Europe.
Please help me.
Thanks

[Q] SM-N900T 4.4.2, rooted, region free, still region locked

I have a T-Mobile USA SM-N900T currently running [ROM][KERNEL][4.4.2-NE4][SM-N9005]CivZ_FlexKat_Rev3.5
The ROM is listed as "region free" however when I attempt to insert one2free Hong Kong prepaid SIM-card I got a 'network locked sim card inserted' error?
I can't use "Region Lock Away" as it's no-longer functional on 4.4.2 - and I can't downgrade to 4.3 because I assume my bootloader has already been upgraded.
Any solution here?
Shouldn't a "region free" ROM no longer enforce the region lock?
re: region lock
jbcholdings said:
I have a T-Mobile USA SM-N900T currently running [ROM][KERNEL][4.4.2-NE4][SM-N9005]CivZ_FlexKat_Rev3.5
The ROM is listed as "region free" however when I attempt to insert one2free Hong Kong prepaid SIM-card I got a 'network locked sim card inserted' error?
I can't use "Region Lock Away" as it's no-longer functional on 4.4.2 - and I can't downgrade to 4.3 because I assume my bootloader has already been upgraded.
Any solution here?
Shouldn't a "region free" ROM no longer enforce the region lock?
Click to expand...
Click to collapse
Check out this rom: http://forum.xda-developers.com/showthread.php?t=2487425
It is region free but it's a N9005 custom rom and it works fine with a N900T Note 3
phone. The only thing which it will lack is wifi calling.
After flashing the rom you will need to flash the wifi/nfc/bluetooth fix in recovery
in order to get the wifi working. (not wifi calling!)
Here is the link to the wifi/nfc/bluetooth fix zip file: https://dl.dropboxusercontent.com/u/45687485/Needed_Files_BT_WIFI_NFC_Flashable.zip
Good luck!
Misterjunky said:
Check out this rom: http://forum.xda-developers.com/showthread.php?t=2487425
It is region free but it's a N9005 custom rom and it works fine with a N900T Note 3
phone. The only thing which it will lack is wifi calling.
After flashing the rom you will need to flash the wifi/nfc/bluetooth fix in recovery
in order to get the wifi working. (not wifi calling!)
Here is the link to the wifi/nfc/bluetooth fix zip file: https://dl.dropboxusercontent.com/u/45687485/Needed_Files_BT_WIFI_NFC_Flashable.zip
Good luck!
Click to expand...
Click to collapse
Same results with this ROM Boots to a "Enter SIM unlock key", and "Network locked SIM inserted" screen.
I don't understand - as my understanding was the region-lock was only for the INITIAL activation of the phone in it's home market, IE it was activated at some point in the US with a US sim!?
It would figure now that it has been rooted/ROM replaced it wouldn't region lock again?
The phone did have a black-listed IMEI - but worked on roaming here with my US sim prior to porting the number to Google Voice smh
jbcholdings said:
Same results with this ROM Boots to a "Enter SIM unlock key", and "Network locked SIM inserted" screen.
I don't understand - as my understanding was the region-lock was only for the INITIAL activation of the phone in it's home market, IE it was activated at some point in the US with a US sim!?
It would figure now that it has been rooted/ROM replaced it wouldn't region lock again?
The phone did have a black-listed IMEI - but worked on roaming here with my US sim prior to porting the number to Google Voice smh
Click to expand...
Click to collapse
region free and sim lock are 2 different things.
sounds like you need the sim unlock code
I used freeunlocks.com,you have to do a trialpay thing but there may be one that suits your needs?
cost me just under £5 and I got 4 unlock codes,network,provider,sub-provider and defreeze.
my phone is now sim unlocked and sim unlock also does region lock
jbcholdings said:
I have a T-Mobile USA SM-N900T currently running [ROM][KERNEL][4.4.2-NE4][SM-N9005]CivZ_FlexKat_Rev3.5
The ROM is listed as "region free" however when I attempt to insert one2free Hong Kong prepaid SIM-card I got a 'network locked sim card inserted' error?
I can't use "Region Lock Away" as it's no-longer functional on 4.4.2 - and I can't downgrade to 4.3 because I assume my bootloader has already been upgraded.
Any solution here?
Shouldn't a "region free" ROM no longer enforce the region lock?
Click to expand...
Click to collapse
Hi,
I had the same problem with my European Note 3 when going in Israel.
The solution was to unlock the phone by using a European sim and calling somebody (for instance your voicemail) for 5 minutes or more.
Then it was unlocked...
Try it if you have an American Sim somewhere...
Hope it will help...
RaphaelBEN said:
Hi,
I had the same problem with my European Note 3 when going in Israel.
The solution was to unlock the phone by using a European sim and calling somebody (for instance your voicemail) for 5 minutes or more.
Then it was unlocked...
Try it if you have an American Sim somewhere...
Hope it will help...
Click to expand...
Click to collapse
Thank you, I'll give it a shot.
I went to a Samsung Service Center (in Hong Kong), and they told me I would have to get my "American Carrier" to unlock the phone and that they could not help me.
As I am not a customer of T-Mobile USA anymore I don't think there is much I can do- as I don't think they will help me over the phone or would have any idea what to do at a normal T-Mobile USA store.
I might try to find an American Pre-paid SIM and try that option.

Simlock

I would like to ask @wujke as he is from the same country (and maybe same network as i am) one question.My carrier (from which i bought this device on contract) doesnt support official updates above kitkat.As i updated this phone to lollipop (different modem and firmware) is it possible that i broke a sim lock from my carrier.last week i was abroad and i used sim card from that country with no problem.Since i dont own any other sim cards i would be grateful if somebody could answer this question.Thanks in advance
Everything is possible, maybe it wasn't locked at all. In Telenor I've seen everything, from unlocked phones to locked without possibility to unlock bootloader.

Galaxy S8 US Cellular

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.
Click to expand...
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

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