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.

learn more… | top users | synonyms (3)

2
votes
1answer
176 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
vote
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 ...
0
votes
1answer
1k 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 ...
2
votes
0answers
55k 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 ...
0
votes
0answers
720 views

Unlock Bootloader MTK65xx

Does anybody know how to unlock the bootloader in MTK phones? Thanks in advance! ;)
2
votes
0answers
188 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 there?...
0
votes
0answers
407 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
vote
1answer
187 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 ...
1
vote
2answers
3k views

Can I unlock my Razr M (Verizon) for international use?

I have a Verizon Razr M that was given to me for free. It's a Verizon model, but it has never seen a network. (I use it as an WiFI android iPod touch for now) I know about CDMA/GSM/4G and all that. ...
-1
votes
1answer
73 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
votes
0answers
225 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 ...
5
votes
1answer
3k views

I cancelled SIM unlock and now I cannot unlock the device

When I inserted SIM card into my phone I tapped the "cancel" button, assuming that it would be possible to unlock it later. But I fear that my assumption was wrong. The device is a Sony Ericsson ...
0
votes
1answer
224 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 ...
3
votes
3answers
25k views

Network unlock code not working

I have bought a used Motorola Defy (MB525), rooted, running CyanogenMod 9 (ICS 4.0.4). It is locked to work with only a specific carrier. I bought an unlock code, and unaware to this the previous ...
0
votes
1answer
740 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
0answers
555 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 ...
1
vote
2answers
12k views

Unlock Motorola Droid Razr Maxx (Verizon)

I have a Motorola Droid Razr Maxx on Verizon in the US. I want to take it to Straight Talk, a MVNO that uses Verizon's network. I bought the Straight Talk SIM card, but I get an error that the phone ...
0
votes
1answer
297 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
votes
1answer
948 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 ...
2
votes
1answer
6k views

Does installing CyanogenMod lock device's network?

today after almost one year using the stock Android version on my Xperia Mini (ST15i, I was on Gingerbread) I decided to flash an official CyanogenMod ROM (CM7). So I first unlocked the bootloader of ...
0
votes
0answers
2k 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
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 ...
0
votes
0answers
59 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 SIM-...
0
votes
0answers
11 views

Pre-rooted custom rom for unlocked xperia neo v mt15i [duplicate]

I have unlocked bootloader xperia neo v mt15i, version 4.0.4, build 4.1.B.0.587. I would like to flash pre-rooted custom ROM. Need custom rom link and step-by-step guide.
1
vote
2answers
3k views

How to unlock Motorola Atrix 4G for other carriers?

I bought a Motorola Atrix 4G MB860 and discovered that it is locked. I received an unlock code from AT&T but I receive the message "network unlock code unsuccessful" which according to AT&T ...
0
votes
1answer
977 views

how to solve Network not found problem in Samsung Galaxy s2?

I have UK based Samsung Galaxy s2 gt-i9100 and i was using since last 2 years without any problem in india but suddenly i found it says network problem so how to solve this ? model number - Gt-I9100 ...
0
votes
0answers
463 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
12 views

Galaxy S5 unlock + change region [duplicate]

I have an stock, locked, Telstra Australian Galaxy S5 and I'm about to live in the UK. I would like to know if there is currently a way to unlock it without code so I can use it with an English ...
1
vote
1answer
712 views

Does having CWM mean bootloader is unlocked?

I flashed CWM using Rom Manager. Does this mean that my Galaxy S4 bootloader is unlocked? I'm using Samsung Galaxy S4 (SGH-I337M) (Canadian Telus)
1
vote
1answer
1k views

Which IMEI number should I use to unlock my Motorola DROID 2 GLOBAL (A956) IMEI or IMEI SV?

I recently bought an unlock code from Cell Unlocker.NET to unlock a Motorola DROID 2 GLOBAL which was locked to the Verizon Wireless network. Navigating to the about phone section Menu - > ...
2
votes
3answers
2k views

How can I unlock my HTC One V locked by 3 (UK Carrier, www.three.co.uk)?

I have a HTC One V which is provided by 3 (www.three.co.uk) under contract. I recently bought a Nexus 4 from Google Play because of the price drop, and I'm using my 3 SIM in the Nexus which is ...
0
votes
0answers
793 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 ...
4
votes
2answers
73k views

How can I remove the SIM lock from my Samsung Galaxy S Blaze 4G T-Mobile?

I got an Galaxy S Blaze 4G as a gift from USA. The phone is locked and did not accept any SIM card in my country (just for T-mobile). Instead it ask for a unlock code. Ts there any software way to ...
0
votes
2answers
136k views

Network Unlock Code vs SIM Unlock PIN [closed]

I bought an unlock code from http://www.unlockcode4u.com because my phone was asking for it (Enter PIN Code) I got the code and it does not work. Actually only allow me to enter 4 digits. Now this ...
2
votes
2answers
226 views

Will a Factory Reset on an unlocked Samsung S2 4G T989 from T-Mobile relock the phone?

I have a Samsung S2 4G T989 from T-Mobile which is unlocked. It is currently using ion Indian carrier. I want to Factory Reset it. Will it be locked again after performing a reset? I don't have any ...
1
vote
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 ...
0
votes
2answers
3k views

Htc one m7 International not recognized in adb mode

I have an htc one m7 running bootloader hboot 1.56. I unlocked the bootloader via htcdev.com The bootloader now shows Unlocked My phone is recognized in adb when the phone is turned on. But when i go ...
1
vote
2answers
55k views

How can you find which carrier a Samsung Galaxy S3 (GT-I9300) is locked to?

I bought a S3 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 out?
1
vote
0answers
127 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 ...
2
votes
4answers
2k views

Is it possible to unlock my Samsung Galaxy 3(GT-i5801)?

I moved to another country and absent-mindedly bought a SIM card for my GT-i5801 (from Orange UK) Now it's asking for a network lock code. I have searched the net and everything points to me going to ...
1
vote
1answer
152 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 ...
3
votes
4answers
21k views

How can I remove the SIM lock from a Samsung Galaxy S?

I bought one from bell Canada, and I can't put in a SIM card from any other service provider. Does anyone know how to unlock this phone?
2
votes
0answers
493 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 ...
0
votes
1answer
2k views

Problems with a linsay f-10hd cosmos locked [duplicate]

so I have this tablet linsay f-10hd Specs 10.1 " 0S: 4.04 Google Android CPU: 1.5 Ghz CORTEX A-8 1 GB RAM 4 GB Hard Drive Internal Memory Web CameraBuilt in 3-D acceleration, 3-D Effect 2160 P HD Wi-...
0
votes
1answer
109 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 ...
3
votes
2answers
771 views

Can the Nexus 7 LTE connect to 3G networks?

Is it possible to connect to 3G networks with the Nexus 7 LTE? Is it possible with an unlocked device or only with limited networks or standards? I've tried to Google it but no one seems to have ...
0
votes
1answer
524 views

Locked out with no service!

I was fiddling with the lock your SIM card features and locked it, but the password I used now will not open it, and it is locked with no service, screen says screen is PUK locked and is asking for ...
0
votes
1answer
196 views

Can I use my bootloader-locked phone with a different network?

I just bought an Xperia Z and the bootloader is locked. Do I need to unlock it in order to run it on a new SIM card and can I switch to Virgin? It's OK if I can't: I will just buy a Bell SIM for $10, ...
1
vote
1answer
1k views

Determing SIM/network/carrier lock status in software

Is there a way to determine if a Galaxy S3 (i747, running 4.1 JB, stock ROM, but with root) is currently carrier locked in software (i.e. without needing to obtain and insert a different network's SIM)...