Phones often ship with a SIM lock that ensures they can only be used with a single carrier. Unlocking a phone allows it to be used with any carrier.

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1answer
370 views

Samsung I9300 - Network unlock fails

I recently flashed a custom ROM on my Samsung I9300. Everything is working fine, except I have to enter a 'SIM network unlock PIN'. I assume, that this is not the usual 4-digit PIN code. If I enter ...
2
votes
1answer
152 views

How can I tell if my phone is locked?

Thanks to a helpful commenter at a previous question, I now know that Starting February 11, 2015, All Four Major US Carriers Will Let You SIM Unlock Your Phone. But that just raises another question: ...
1
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1answer
71 views

How can you find which carrier a LG D803 is locked to?

I bought a LG D803 and it came locked to an unknown carrier. All the unlock services require the information of which carrier the phone is locked to give me an unlock code. So, how can I find that ...
1
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1answer
140 views

Changing carriers and sims - how do I know if the new network will work?

My family is considering switching to T-Mobile, and I would like to bring my current Droid 4 with me. I have already stopped by a local T-Mobile store to see if their sim would work. The phone ...
0
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1answer
186 views

Galaxy S5 after System Update is asking for SIM Network Unlock PIN

I recently purchased a Galaxy S5 on http://amazon.co.uk. This was a well deserved upgrade from a galaxy S2. When I got the phone I powered it on with my Vodafone Spain SIM card and it worked ...
0
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1answer
735 views

How can I remove the SIM Lock on my Samsung S2 LTE (SC-03D) Japan Docomo?

I am looking for a way to make the phone sim free without going to the company's shop and paying for them to unlock it. Anybody know how it can be done? The SC-03D does not have an nv_data.bin file ...
0
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1answer
767 views

I've exceeded my unlock attempts (10). Is there any way to unlock my phone?

Due to AT&T being a horrible company, I believe the customer "service" has led me through more than my allotted attempts at unlocking my phone. Because my phone was refurbished, the attempts may ...
0
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1answer
1k views

Using non-Verizon SIM on Motorola XT912 Verizon phone

I am living in India and my uncle gave me a brand new Motorola DROID RAZR XT912 Verizon phone, but I have inserted a non-Verizon SIM and there is no signal and I got the following error message: "This ...
0
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1answer
276 views

Can you unlock brand new phones?

I saw a cheap Verizon HTC ONE M8 on eBay, but I am on AT&T. If I was to get that phone, could I unlock it straight away? I thought I remember hearing somewhere that you can't unlock phones for a ...
0
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1answer
102 views

Can an encrypted Android phone be unlocked with an USB drive some way?

I want a fast way to login to the system without entering difficult credentials. If the usb key is not present there won't be the ability to decrypt the system ... Some 2-factor solution without NFC ...
2
votes
0answers
172 views

How does SIM unlocking work under the hood?

I know what SIM unlocking is and how to do it, but my question is how does SIM unlocking work under the hood? What is actually going on that prevents me from just popping another carriers SIM in ...
2
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0answers
49k views

Network SIM unlock code not working

I paid to get an unlock code for my Samsung Galaxy S4 Active SGH-I537 locked to AT&T. I have tried to enter the unlock code given when the phone boots with my other carrier SIM card inserted, but ...
2
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0answers
471 views

Why can't the Sprint HTC One use GSM ROMs?

Everywhere I've looked, I've found that the HTC One physical hardware (USA) is the same regardless of the carrier--all models of the USA phone containing both CDMA and GSM radios. If this is the ...
2
votes
0answers
5k views

How to remove network lock samsung galaxy s advance

Title says it all. I have been scouting the net for the past day and a half and haven't found a way to remove/unlock the network lock on my SGS Advance. It is already rooted. I have tried those SGS ...
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0answers
93 views

Unlock Phone without the Screen (neither seeing anything nor touch is possible) or USB-Debugging

I have a problem with my mothers Samsung Galaxy S3. The Screen is completly dark and it seems like the phone doesn't react to touches. There are pictures and contacts at the internal storage, wich are ...
1
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0answers
110 views

samsung galaxy S6 Sim Network unlock pin

I Have bought a Samsung galaxy s6 model from Saudi Arabia and inserted saudi STC sim and i just made a call and brought it to India.I tried with inserting Indian SIM and it asked me for the "Sim ...
1
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0answers
39 views

Galaxy S4 outside Europe

I have a Galaxy S4 bought today in Europe. Also I have a SIM card from Orange and everything works fine here. But I discovered that there could be a kind of lock if I try to use another SIM card from ...
1
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0answers
118 views

Droid Mini in France with local SIM card?

I have a Droid Mini bought in America with Verizon that I'd like to be able to use in France. It's supposedly one of their "Global Ready" phones, so using it here should be as simple as getting a new ...
1
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0answers
3k views

How to unlock Samsung Galaxy S3 SCH-R530?

Can anyone tell me if the Samsung Galaxy S3 LTE model SCH-R530 can use any other non-contract carriers besides U.S. Cellular? I have searched, and I am getting frustrated with trying to find a way to ...
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0answers
1k views

zte turkcell maxiplus 5 sim lock after flashing custom rom

I have a ZTE phone, that I installed a CWM recovery. After that I tried to install a custom rom.... After many problems I managed to flash the official rom from ZTE site by using their online update ...
1
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0answers
36 views

Help samsung home pin

I have a Samsung Galaxy S3 mini. Sometimes when I go to enter my PIN, if I touch anywhere on the screen i.e. on my screen saver, any of the numbers, or go, it just inputs "0" in the entry box. How can ...
0
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0answers
54 views

How to remove carrier lock?

I have a Sony Xperia Ray. What is neccessary to remove carrier lock? It is important that the lock it truly accidental, I got it just by using T-Mobile sim card for a while. And now the phone ...
0
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0answers
48 views

How is the network lock interrupt handled by the Android OS? Is it even handled by the OS?

I am unsure if the interrupt is handled by the OS or not, or if there is even an interrupt or not, however I am referring to the pop up message that ensues when you put in another carrier's sim card ...
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0answers
67 views

Unlocking/initializing factory-resetted phone [no sim]

HTC Magic (T-Mobile myTouch) I have an old pre-paid phone which I want to give to my dad for running offline and Wi-Fi apps. I factory-reset it to quickly get rid of my old stuff and in the hope to ...
0
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0answers
152 views

SIM Unlock Samsung Galaxy S III straight talk wireless model # SCH-S968C

I have bought a Samsung Galaxy S III straight talk wireless model no. SCH-S968C via mail from WalMart. So, any GSM line is not working. I think it is SIM-locked. How can I do a SIM unlock and be ...
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0answers
60 views

Strange case: mobile data is blocked by provider but working on cyanogenmod

I just encountered a really strange case, I was wondering if anyone had an explanation: this sim card suddenly stopped working, we tried the card on 4 different phones and the 3G wasn't working on any ...
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0answers
105 views

Galaxy s5 network mode disabled

I recently bought a Samsung Galaxy S5 (SM-G900R7) from Swappa.com and as per the seller the phone has a clean IMEI (which is true as per multiple website checks) and is unlocked**(I have a doubt ...
0
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0answers
152 views

Unlocking Samsung Galaxy S4 SGH-1337M

I'm having difficulties unlocking my phone. Everything goes smoothly until I get to the options within the Network lock in the service menu. Instead of three options I only get one. If I press the ...
0
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0answers
321 views

Enter PIN code…without sim card inserted

I have one problem with MeanIT MG430 phone - there is no sim card inserted but when I turn it on, there is "Enter PIN code" screen. PIN code is "connected" with SIM card, so why I see this screen ...
0
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0answers
150 views

HTC Amaze 4G asks for SIM IMSI unlock PIN

Some two years ago I bought an HTC Amaze mobile from HTC vendor in Pakistan with HTC warranty through their local agent in Pakistan. Mobile was working well. I tried to upgrade its Android from 2.3.4 ...
0
votes
0answers
117 views

Does not prompt for unlock code

I have a Samsung S4 L720 that is a Sprint model. However, I am trying to unlock it for use with Tmobile. I have the unlock code, Sprint provided it to me. But, I can't for the life of me get a prompt ...
0
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0answers
268 views

Note 4 SM-N910c sim network unlock code

I have bought a note 4 international variant from KSA and i dint use that there, when i brought it to india and tried to insert a sim there it was the sim network unlock code. Anybody please help me ...
0
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0answers
216 views

SIM unlock a rooted HTC Desire (Bravo) with Ubuntu

I've just followed a tutorial to root and install CM7 on an old HTC Desire using Ubuntu only: http://blog.adorjanitamas.me/2013/03/howto-root-htc-desire.html I now want to SIM unlock the device - how ...
0
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0answers
109 views

Unlock carrier for Samsung S3 4G LTE bought in South Korea

I bought Samsung S3 4G(LTE) from South Korea in which India sim card is not working. I am getting error saying "Device registration failed". Kindly help.
0
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0answers
612 views

Unlock Bootloader MTK65xx

Does anybody know how to unlock the bootloader in MTK phones? Thanks in advance! ;)
0
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0answers
170 views

Do I need to unroot my phone to unlock my phone?

I received an unlock code for my Samsung Galaxy S3, which didn't work when I typed it in. The 3rd party I got the code from told me that you cannot unlock a phone if it is rooted, and I should install ...
0
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0answers
57 views

HTC inspire 4G unlocking from AT&T network

how do I check if my htc inspire 4G is unlocked. I tried putting another sim card intothe phone but it did not work so what do I do next to check if the phone is already unlocked
0
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0answers
128 views

Unlocking htc one m8 T-Mobile

I'm looking to buy a HTC One M8 T-Mobile version, and unlocking it. I read on gsmarena.com that the frequencies that work on that phone are these. GSM 850 / 900 / 1800 / 1900 HSDPA 850 / 1700 / 1900 ...
0
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0answers
391 views

Phone antitheft lock on tecno m3

I changed Sim cards on my tecno m3, and it sent a message to my message contacts and locked the phone. I couldn't remember the code so I put the Sim card back. But it didn't work
0
votes
0answers
358 views

Unlock code for Galaxy S3 not working

I have a Samsung Galaxy S3 with an o2 (UK) netlock. I got an unlock code from o2 but it doesn't work. It just returns a "network unlock request unsuccessful". It's on 4.3 and tried doing a factory ...
0
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0answers
106 views

No data or mms on Sprint Galaxy S3 flashed to verizon

A couple months ago, I cloned my Verizon LG octane with my sprint s3. So far it has been good, as far as voice and text goes, but I still haven't been able to get mms or data to work(3g). I think that ...
0
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0answers
440 views

Retrieving lost SIM PIN and PUK

If the SIM and PUK are stored on the SIM card, then why can't an Android application read this information and display it to the user? Thanks.
0
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0answers
489 views

Disabling/Changing PIN on Android device: where are the disabled flag and new PINs stored (SIM or internal storage)?

On my Samsung Galaxy SIII, one can go to Settings -> More -> Security -> SIM card lock -> Set up SIM card lock -> Lock SIM card` which displays a check box which can be used to configure the phone to ...
0
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0answers
207 views

problems unlocking bootloader of xperia z3

i'm trying to unlock bootloader of my xperia z3 but i'm encountering problems. I followed the instructions on sony's site and i got to the point where i have to connect the phone in fastboot mode to ...
0
votes
0answers
1k views

how to unlock O+ 8.91 inorder to enable to mobile data connetion

i have O+ 8.91 with dual sim and sim 1 is locked to sun cellular sim only..and only sim 1 can connect to mobile data connection. I just want to know how to unlock sim 1 so that i can connect to ...
0
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0answers
57 views

ServiceProvider eating my battery after SIM unlocking

I had my Samsung Galaxy S3 SIM unlocked last week. It runs a rooted Android 4.1.2. Since then, I've noticed that ServiceProvider is consuming much more battery that I have ever noticed before. Can ...
0
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0answers
431 views

Cyanogenmod unlocked phone requires network unlock code

I have a Sony Ericsson Xperia Arc that I installed Cyanogenmod (v. 9.1.0-anzu). The phone is not locked to a specific network as a) the danish operator where I bought the phone does not do this and b) ...
0
votes
0answers
753 views

Need help in unlocking LG G2 LS980ZVC, running on KitKat

I am looking for a working link to a tutorial explaining how to globally unlock LG G2 LS980 (Android Version 4.4.2, Software Version LS980ZVC). I tried several, but can't unlock the phone. Most ...
0
votes
0answers
2k views

Any way to unlock T-Mobile ZTE V768?

A friend of mine purchased a ZTE V768 Concord from ZTE. It was not under any contract, but it is still locked to use any foreign SIM-card anyways. We are far away from the US, so is there any way to ...
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votes
0answers
28 views

Cannot get unlock code to work for Sprint LG Flex 2

I have an unlock code (provided by Sprint - in the form of a number ##xxxxxx#) When I put the code in the dialer, it says Invalid MMI Code