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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11 views

How to check if my Xperia M4 Aqua is unlocked without a SIM card

I need some help! Can someone tell me if my phone is unlocked? Here is a screenshot
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19 views

Network SIM unlock code stopped working?

I have a Vodafone Smart Ultra 6, which was locked to (obviously) Vodafone. When I purchased the phone I also purchased an unlock code from eBay. This worked, and I've been using the phone for 4 months ...
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133 views

How does SIM lock work?

I'm considering buying a network-locked phone and unlocking it myself (cheaper than buying an unlocked phone). I'm wondering where Android phones store information about what networks to connect to. ...
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1answer
141 views

Will my phone still be unlocked after I install CyanogenMod?

I've recently unlocked my phone so that it can work with any SIM card, and I want to install CyanogenMod. What I'm wondering is, since CyanogenMod is going to wipe most of the data on the phone, is ...
4
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1answer
79 views

How to use phone calls without code?

My friends and family need to use my cellphone regulary, it doesnt bother me, because some of them cant have a cell but still need one just in case...the problem is that i dont want them to have ...
0
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1answer
31 views

How To Unlock Samsung Note 4

I bought this phone on eBay. Description said clean IMEI and not blacklisted per Swappa. My wireless company said it was locked. It's a Verizon phone. I was trying to get it on my Cricket account ...
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0answers
69 views

Note 5 reading only one SIM card

My Samsung Galaxy Note 5 was working fine until one day when I used a new SIM card for one mobile network instead of the one I lost. That SIM wasn't recognized by the phone and it was showing "...
0
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0answers
37 views

Samsung tab s2 update service temporarily unavailable

I just got a galaxy tab s2(i had asked for wifi only, but got verizon locked lte instead) Now when I try to go to system updates, it says 'update service temporarily unavailable' What do I do to fix ...
0
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0answers
69 views

How do I unlock my new Galaxy tab s2

I just purchased a Galaxy tab s2 9.7 from a website. I had asked for a wifi version, but I got an LTE version locked with verizon. I would like to know if there are ways to unlock the sim so that I ...
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0answers
31 views

Samsung galaxy s4 - how do i find out what my phone is locked to?

I have recently purchased a Samsung galaxy s4 off of eBay but when it arrived it did not have any indication of what network it belonged to, every time I have gone on websites and typed in the coding ...
0
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0answers
106 views

Using Samsung Galaxy S3 without sim card

I recieved a Samsung Galaxy S3 Mini I8190 from a friend. It shows T-mobile on startup and shutdown, but after putting the IMEI-code in at the T-mobile site they say its unlocked already. I never had ...
0
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0answers
178 views

SIM unlocking on downloaded ROM

Hello android community. This title may seem very usual, like there are endless posts online to find the solution to this. However, in this situation, it is not as easy as it seems. (look at the ...
0
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0answers
130 views

Find original phone carrier/network. Samsung Galaxy Core LTE

With a Samsung Galaxy Core LTE (SM-G386W) how are you able to find the network it originally belonged to so that you can unlock it? This model does not work with IMEI searches in the sense it does not ...
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0answers
2k views

How to network unlock (Country Code) of Lg Tribute 2 LS665 phone

I have LG Tribute 2 LS665 Virgin Mobile. It is lock to Sprint network. I received network unlock code from unlockcode247.com successfully by providing IMEI to them. Now I am trying to give that code ...
0
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0answers
229 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
92 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 ...
1
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0answers
153 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 ...
0
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0answers
141 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
345 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 ...
1
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0answers
181 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
696 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 Mobility,...
0
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0answers
81 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
248 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 ...
0
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0answers
177 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 here)*...
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0answers
215 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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1answer
312 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
732 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 ...
0
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1answer
308 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
526 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 ...
1
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1answer
109 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 out?...
2
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1answer
603 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 ...
1
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1answer
745 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
182 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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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
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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 ...
0
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0answers
733 views

Unlock Bootloader MTK65xx

Does anybody know how to unlock the bootloader in MTK phones? Thanks in advance! ;)
2
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1answer
84 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 ...
3
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0answers
192 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
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0answers
417 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
195 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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1answer
76 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
565 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
766 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
226 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
7k 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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1answer
980 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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228 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
2k 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
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 ...
1
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1answer
5k 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 ...