Using International Sim in Unlocked Fold 2 - Samsung Galaxy Z Fold 2 Guides, News, & Discussion

I flashed the U1 from the U software, though I put an international Sim in my phone and it's not working. After entering the sim pin I get a screen that says enter MCK password and "your device has used all the attempts" despite never entering this code. I believe I can still enter a password though. What do I do to get past this and unlock sims?

If anyone could help with this it would be appreciated. Like maybe I should flash the international version?

You need to purchase unlock service. For doing this work.
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[Q] Sim Unlock Code Not Accepted

Hi,
I have HTC one on Three UK network. I took Sim network unlock code from 3 different paid servers, All have given same code but code does not work. It says Sim Password incorrect. Spoken to supplier and he said it is some bug in new android system. Can anyone explain me how to fix this. I appreciate that.
I already 3 tried another source and checked imei etc.
talkways said:
Hi,
I have HTC one on Three UK network. I took Sim network unlock code from 3 different paid servers, All have given same code but code does not work. It says Sim Password incorrect. Spoken to supplier and he said it is some bug in new android system. Can anyone explain me how to fix this. I appreciate that.
I already 3 tried another source and checked imei etc.
Click to expand...
Click to collapse
Are you on a custom CID ? On a custom ROM? If yes, change them back to the original and it'll work.
attanasi0 said:
Are you on a custom CID ? On a custom ROM? If yes, change them back to the original and it'll work.
Click to expand...
Click to collapse
No it is original rom, original recovery but still not accepting. In attempt to flash i loaded up custom recovery now but unable to find any stock rom ruu on three. Hbot is 1.54 and s on and bootloader locked (i unlocked it using htcdev now)
talkways said:
No it is original rom, original recovery but still not accepting. In attempt to flash i loaded up custom recovery now but unable to find any stock rom ruu on three. Hbot is 1.54 and s on and bootloader locked (i unlocked it using htcdev now)
Click to expand...
Click to collapse
This is purely anecdotal but the phone I had before this was the s2 LTE model on AT&T, when they gave me the code it kept saying it was unsuccessful until I ran out of attempts. However when I actually put in a t-mobile sim card it worked fine and it was fully unlocked. Maybe try that?
Danmanlott said:
This is purely anecdotal but the phone I had before this was the s2 LTE model on AT&T, when they gave me the code it kept saying it was unsuccessful until I ran out of attempts. However when I actually put in a t-mobile sim card it worked fine and it was fully unlocked. Maybe try that?
Click to expand...
Click to collapse
You do know that to unlock the phone you need a SIM card from a different company inside the phone so that it asks for Network Unlock Code... SIM Lock is not the same...
attanasi0 said:
You do know that to unlock the phone you need a SIM card from a different company inside the phone so that it asks for Network Unlock Code... SIM Lock is not the same...
Click to expand...
Click to collapse
Obviously phone is asking for sim network unlock code when we put non accepted sim card. So phone is not unlocked. We do quite a lot unlocking and few phones get this error, we have to refund customer but I am seeking solution for it. It is only in Android phones (HTC and Samsung).. Samsung's we usually unlock using unlocking boxes but HTC One is not supported other than code. (Setool support older HBOOT).

AT&T HTC One on Vodaphone in NZ

I'm from the US and am in New Zealand for a month. I own an HTC One which I purchased from AT&T and have been using on their network in the States. I've unlocked the phone, and also have S-Off. I've purchased a prepaid SIM card from Vodaphone in New Zealand. When I insert the SIM card, the phone asks me for the 8 digit SIM unlock code, so I entered the 8 digit PUK code provided by Vodaphone with the SIM. The phone tells me this code is invalid. I'm not quite sure why this isn't working - is it possible I need to load a different firmware to use the phone in New Zealand?
Kernel is 3.4.10-g31f7883
Firmware looks like 3.62.401.1
I'm currently using ViperOne ROM.
Certainly appreciate any input on this issue.
Thanks,
Josh
Well, I did not realize that bootloader unlock and SIM unlock are two different things. That's a bit confusing. Wish I had figured that out prior to flying here.
Epos7 said:
I'm from the US and am in New Zealand for a month. I own an HTC One which I purchased from AT&T and have been using on their network in the States. I've unlocked the phone, and also have S-Off. I've purchased a prepaid SIM card from Vodaphone in New Zealand. When I insert the SIM card, the phone asks me for the 8 digit SIM unlock code, so I entered the 8 digit PUK code provided by Vodaphone with the SIM. The phone tells me this code is invalid. I'm not quite sure why this isn't working - is it possible I need to load a different firmware to use the phone in New Zealand?
Kernel is 3.4.10-g31f7883
Firmware looks like 3.62.401.1
I'm currently using ViperOne ROM.
Certainly appreciate any input on this issue.
Thanks,
Josh
Click to expand...
Click to collapse
If I remember correctly (this is all from memory), for the unlock code to work, you need
1) correct (original) CID and MID
2) stock ROM (some were able to do it on custom ROMs, but not sure if all work or only certain ones)
3) stock firmware for above ROM
4) stock recovery
5) LOCKED or RELOCKED bootloader
6) S-Off won't matter, and that will be your ticket to unlock again
you can search the forum here for SIM UNLOCK, there are quite a few similar cases, which got solved by a combination of points 1 through 5.
If anyone stumbles onto this thread in the future...
Turns out I needed a code from AT&T, as I needed to carrier unlock the phone before being able to use the Vodaphone SIM. I tried contacting AT&T to get the code, but they won't give it to you unless you are out of contract.
I was able to get an unlock code using option 5 in this thread:
http://forum.xda-developers.com/showthread.php?t=2242473
I loaded a stock ROM, but left the bootloader and my custom recovery on there, and the unlock code worked just fine.

SIM Unlock Reset by HTCDev Bootloader Unlock

Basically, I have an ATT branded M7 that should have been carrier unlocked. First thing I did was complete the HTCdev unlock to install TWRP and supersu. I completed a SIM swap from a mini-SIM to the micro-SIM for this phone and it is asking for the network password which the provider is telling means that it is not carrier unlocked? Could the HTCdev unlock caused this? Seems like the SIM unlock is in a different area of the boot loader that requires s-off so I think no. Need to contact the eBay seller but anyone have any other suggestions? Is S-off and unlock the only option for a permanent SIM unlock?
genseng said:
Basically, I have an ATT branded M7 that should have been carrier unlocked. First thing I did was complete the HTCdev unlock to install TWRP and supersu. I completed a SIM swap from a mini-SIM to the micro-SIM for this phone and it is asking for the network password which the provider is telling means that it is not carrier unlocked? Could the HTCdev unlock caused this? Seems like the SIM unlock is in a different area of the boot loader that requires s-off so I think no. Need to contact the eBay seller but anyone have any other suggestions? Is S-off and unlock the only option for a permanent SIM unlock?
Click to expand...
Click to collapse
Bootloader unlock and s-off are not related to sim-unlock. You probably got scammed by the seller, but sim-lock can be removed easily using a sim-unlock code which you can buy online (for really cheap). So it might not worth wasting your time contacting the seller.
There is another method to sim-unlock that require s-off(sieempi)
Sim-unlock is permanent even if you unlocl/relock bootloader or if you turn security on/off (s-on/s-off)
Thanks for confirming. Is there anyway to determine if it has been hardlocked?
genseng said:
Thanks for confirming. Is there anyway to determine if it has been hardlocked?
Click to expand...
Click to collapse
what are you talking about? Hardlocked?
Something about if an incorrect code 10 times there's another layer of locks (found AT&T page that references PUK and PUK2 codes). Are those different than the carrier lock we're discussing? Found a cheap code on eBay. Ordered it, will find out shortly I guess.
genseng said:
Something about if an incorrect code 10 times there's another layer of locks (found AT&T page that references PUK and PUK2 codes). Are those different than the carrier lock we're discussing? Found a cheap code on eBay. Ordered it, will find out shortly I guess.
Click to expand...
Click to collapse
AFAIK (I'm not an expert on this) PUK codes are used to unlock the device when a wrong PIN was entered to many times in an attempt to access the device. PUK (Pin Unblock Key = Personal Identification number unblock Key) locks the device on a lower level or/and the sim card can become locked (preventing access to data stored on the card) but this have nothing to do with sim-lock that are locking your phone to a specific carrier.
Im not even sure if PUK is still used, ppl just reset their PIN using their google account or they are performing factory reset....
purchase the sim-unlock code, insert the new sim card, enter the code when prompted.
Thanks for the explanation. I did manage to test the new SIM in another phone and it worked and another known good SIM resulted in the same error (new info since OP). Maybe I should have paid more for 15 minute service... ?
Purchased unlock code did the trick.
genseng said:
Purchased unlock code did the trick.
Click to expand...
Click to collapse
:good:

sim unlock code entry screen not coming up..help!

Hi all;
got my sim unlock code for the nexus 6. when i put in a non carrier sim and boot back up no menu comes up for me to enter the unlock code, just says no service, if i put the original carrier sim back in it works fine..any way to manually invoke the unlock code menu so i can enter it or any other tips..thanks in advance
I can't help with this but it may help others to say what carrier you're locked to..
Sorry..iT's locked to rogers in canada
Since the phone was already used on Rogers, perform a factory wipe to use a new carrier's SIM
My Rogers Nexus 6 came unlocked out of the box. I expect yours is as well. I have never heard of a locked Nexus device sold by a Canadian carrier.
Weird
..just says selected network (telus) what im trying to connect it to is unavailable. Factory reset at this point too

Galaxy S6 relocked itself to T-Mobile after 7 months ?

Hi everyone,
I've been using an SM-920T 64GB Galaxy S6 bought from T-Mobile last summer. I did a permanent unlock using the T-Mobile application and since July I've been using the phone on the AT&T network. I just rebooted my phone today like I always do and upon restarting I got an "Invalid SIM Card" and it brings up a SIM network unlock PIN window that I can dismiss or enter a code into. What is going on?
I'm running XtreStoLite Deo 2.4 if that makes any difference.
Also, does anyone have the T-Mobile Device Unlock apk that comes stock with the phone? This is how I unlocked the phone in the first place but I don't have that app anymore since I run a custom rom, and the play store won't let me download it because I don't have a t-mobile SIM card in the phone.
Thanks!
Well for the benefit of whoever has the same issue. I flashed back the stock ROM via ODIN, ran the T-Mobile Device Unlock app, it said Unlock Unsuccessful in big, but right below it said the phone has been unlocked permanently. I put in my AT&T SIM and it was working again. Then I flashed back my TWRP backup and the phone remained unlocked. The non-Tmo ROMs get the unlock popup when a foreign SIM card is inserted, so getting an unlock code should work, but I didn't want to wait 3 days to receive one.
MrManH said:
Well for the benefit of whoever has the same issue. I flashed back the stock ROM via ODIN, ran the T-Mobile Device Unlock app, it said Unlock Unsuccessful in big, but right below it said the phone has been unlocked permanently. I put in my AT&T SIM and it was working again. Then I flashed back my TWRP backup and the phone remained unlocked. The non-Tmo ROMs get the unlock popup when a foreign SIM card is inserted, so getting an unlock code should work, but I didn't want to wait 3 days to receive one.
Click to expand...
Click to collapse
Can you tell me what ROM you used? I have the g920T also, and bought it USED unlocked from ebay, but it had the FRP (factory reset protection) lock on it. I had my US cellular SIM card in it, even though I was stuck at the "enter your previous used google account on this device" and the SIM seemed to work (saw the LTE bars above).
But the only way for me to bypass the FRP was to flash to the ROM to stock (which I used the G920T tmobile ROM) and I got to the home screen but now it says "Invalid SIM card. Network locked SIM card inserted" just how you were saying.
When I try using the Tmobile unlock app, it says "Server not responding. Please try again later." .
Please help!

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