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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18 views

How to unlock a Motorola droid-m Razr xt907 from verizon

I have a Motorola Droid Razr-M xt907 & I have finished a 2 yr contract with Verizon. I want to change my carrier to Consumer Cellular. I went to Verizon to get it unlocked & they told. me they ...
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1answer
15 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 ...
0
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0answers
21 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
33 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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0answers
57 views

how to unlock my screen

I have a Samsung Gaalaxy S6 Edge and it fails to recognize my finger print. I've also forgotten the backup password. I can't recover my password through my Google account and via "find my mobile" ...
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1answer
69 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
65 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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42 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
26 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
112 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
74 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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46 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
182 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
90 views

Unlock Bootloader MTK65xx

Does anybody know how to unlock the bootloader in MTK phones? Thanks in advance! ;)
2
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0answers
119 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 ...
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0answers
107 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 ...
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0answers
51 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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77 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
173 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
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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
231 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 ...
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1answer
109 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 ...
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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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81 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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0answers
286 views

Unlock a Samsung Galaxy Note 3 SM-N9005

As the title says, im wanting my note 3 unlocked from the 3 (three) network in the UK. I understand the Samsung unlock servers are down which is why i haven't done it myself, but also understand ...
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1answer
38 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.
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0answers
11 views

unlocked bootloader = sim unlock? [duplicate]

I have a motorola G phone and as part of the developer program I can unlock bootloader of the phone. I am just wondering does this mean I am SIM-unlocked as well? i.e., I can take the phone ...
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278 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.
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0answers
328 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
297 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
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1answer
152 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
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1answer
3k 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 ...
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72 views

Htc does not recognize any sim cards

I have a HTC wildfire that i am using as a replacement phone until my contract is up as my former phone is broken. It works fine however wont detect ANY sim cards i use. I have tried an o2 and two ...
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0answers
173 views

unlock remotely locked phone with android device manager

I remotely locked my phone with android device manager and forgot the password, data connection of the phone is also off, what should i do now,
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0answers
29 views

GSM International Galaxy HELP

I have a GSM Unlocked Galaxy MEGA, but it's all in Chinese letters. I factory reset the phone but it still had the chinese apps and everything. It is also missing some device apps like the Play Store. ...
0
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1answer
520 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 ...
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154 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
234 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
898 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 ...
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1answer
2k 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 ...
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0answers
458 views

HTC Desire 816 dual sim - how to activate slot1 in roaming settings?

One of my sim card slots on my HTC desire 816 is not active and doesn't identify inserted sim card. I noticed that on the inactive slot1 settings, there is a number listed at bottom. How can I use ...
0
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0answers
50 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 ...
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0answers
160 views

How to unlock message on HTC EVO

I have forgotten the password for secure messages on my HTC EVO. How do I unlock the message secure box on a HTC EVO to get secured messages without deleting the messages. Is there an app that can do ...
0
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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.
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2answers
75k views

How can I check whether my phone is network locked (Samsung GALAXY S3)?

I have a Samsung GALAXY S3 with a rooted Android 4.1.2. My network provider is AT&T. I tried dialing *#7465625# but it doesn't work:
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289 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) ...
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300 views

Service Mode says Network Lock Not Active

I have accessed the service mode and gotten to Network unlock. When I click on the network unlock, the phone responds with "Network Lock Not Active". When I try to use the phone it"s still asking for ...
0
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0answers
11 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 ...
0
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0answers
207 views

Data works on my phone, internet doesn't?

I recently unlocked my Android phone for an international move, and got a local SIM card. Currently, all 'data' functions are working in apps - Tango, Facebook, Google search, etc. However, the ...
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1answer
473 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)