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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57 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 ...
-1
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0answers
21 views

master password for unlock my phone Samsung galaxy grand duos [duplicate]

I forgot my phone password and I will try more many times password but is it not open please help??
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0answers
49 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
96 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 ...
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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 ...
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0answers
154 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
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 ...
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1answer
301 views

Network unlock a cyanogenmod phone

I have a Galaxy S4, SGH-I337M. I installed an unofficial CM 12.1 ROM because they've only released official CM ROMs up to 11.0. I brought it into a store to get it network-unlocked from Telus ...
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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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1answer
79 views

Can Nexus devices be SIM locked?

I have Nexus 4 from Fido (Canadian provider). I want to use with another provider, but I don't know if it's locked by Fido. I read this discussion and see opposite points of view: NEXUS devices ...
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0answers
107 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 ...
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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 ...
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1answer
187 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 ...
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2answers
505 views

Unlocking Android phone immediately after reboot

I have an Android phone (version 5.1.1) with cyanogenmod (version 12.1). And after rebooting I cannot immediately unlock my phone. If I try to unlock my screen (lock style = pattern) immediately after ...
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1answer
262 views

Is “android_secret_code” a code to unlock the SIM?

On my Sony Xperia E, I copied and extracted my SIM unlock app (the official one) and found a bunch of 7 or 8 numbers with the words android_secret_code. Is this my SIM unlock code? If so, just to be ...
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0answers
323 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 ...
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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 ...
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0answers
151 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 ...
2
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1answer
375 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 ...
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1answer
513 views

Phone asking “SIM network unlock PIN” after flashing new Stock ROM on Xperia S

I have Xperia S (LT26i). Earlier it had 6.2.B.0.211 installed. I flashed it with "XperiaS_LT26i_6.2.B.1.96_1257-6919.ftf", flashing was successful, but after I started my phone I saw this message ...
2
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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: ...
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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 ...
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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 ...
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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 ...
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0answers
217 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 ...
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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.
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1answer
739 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 ...
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0answers
612 views

Unlock Bootloader MTK65xx

Does anybody know how to unlock the bootloader in MTK phones? Thanks in advance! ;)
2
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1answer
55 views

Will flashing CyanogenMod reset the status of SIM lock on Nexus S?

I have Samsung Google Nexus S (SIM unlocked) on Android KitKat. I am planning to install CyanogenMod 11 on it. The question is, will upgrading to CyanogenMod lock my SIM? Will I have to unlock it ...
2
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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 ...
0
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0answers
171 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
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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 ...
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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
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0answers
44 views

Can I unlock and use my AT&T Galaxy S5 in South Korea? [duplicate]

My AT&T contract is expiring in July, which is also when I'm moving to South Korea. I want to use my Galaxy S5 (AT&T version) in Korea after unlocking it and signing a contract with a local ...
0
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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 ...
1
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1answer
171 views

My Rooted Note 4 needs a new carrier

I have a galaxy note 4 from T-Mobile the phone is rooted. Now I need to switch carriers to At&t. I have the code to unlock the phone but I need to know (if I put the new at&t Sim-card in my ...
0
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0answers
12 views

How To Separate a Device From Its Service Provider? [duplicate]

I was wondering of any one knows, if you can change the provider from Verizon to AT&T or Sprint? If it's a Version phone is it always a Verizon phone?
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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 ...
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votes
1answer
50 views

how can i unlock my locked screen of lg p 500

my screen locked after too many attempts but my volume key is also not working for hard reset. can any body have idea? due non working condition of my volume keys i am unable to hard reset.
0
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0answers
442 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
491 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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1answer
580 views

Possible to change SIM card PUK on Android device?

On my Samsung Galaxy SIII, one can go to Settings -> More -> Security -> SIM card lock -> Set up SIM card lock -> Change SIM PIN to change the default PIN that came with the SIM card. ...
0
votes
1answer
201 views

Why am I not receiving network signals on a Samsung S3 T-999?

I just bought a Samsung S3 T-999. The problem is when I switch the cellphone on, it connects to my network but just for a second. The moment that second is gone, I lose signal completely. So it's not ...
0
votes
1answer
5k views

Both Sims are not detected after update Lenovo A390 with the latest ROW firmware

I have format my Lenovo A390 and update to latest ROW firmware version A390_ROW_S316_130730. Everything work fine but sim cards not detected. At down of the lock screen shows Invalid IMEI. In the ...
0
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1answer
771 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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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
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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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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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1answer
4k views

Unlocking SIM card Huawei Ascend Y530

I recently bought Huawei Ascend Y530 which is SIM-locked in a swiss provider, swisscom that is. I checked through the web to find how can a sim-locked phone be used with any sim, but surprisingly I ...