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.
Questions tagged [sim-unlocking]
157 questions
9
votes
3 answers
Is there a free way of unlocking an Android phone from a particular network?
I bought a cheap Android handset for development and it is an exclusive to a particular network.
I would like to unlock it so I can use an existing SIM card from another network. I've done some googling and it appears that there are many services…

user155695
- 619
- 6
- 9
4
votes
2 answers
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 unlock the phone (maybe with help of root)?

mohammad
- 41
- 1
- 1
- 4
2
votes
1 answer
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 the correlating correct 4-digit PIN, it says 'SIM…

de-facto
- 163
- 1
- 1
- 10
2
votes
1 answer
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: how do I know if my phone is locked in the first…

Europe2015
- 31
- 2
2
votes
1 answer
Motorola Motoroi South Korea o South Africa change over
I have a Motorola Motoroi XT720 that I bought in South Korea. My service provider is SK Telecom. When I insert my South African sim card (Service provider Vodacom, and using the phone while in South Africa) in to the phone, the phone simply states…

Chris Anderson
- 21
- 1
1
vote
3 answers
Is a device Unlock Code required when changing providers?
So... I just switched from AT&T to Cricket Wireless. They gave me a new SIM, and AT&T gave me an Unlock Code. I have an Android Samsung Galaxy Skyrocket S2.
I use Cricket Wireless.
I put in the new SIM, and was never prompted for a Code. I was able…

Zeno
- 123
- 1
- 1
- 6
1
vote
0 answers
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 unlock it?
I know those services like this, but…

Max Krizh
- 111
- 1
- 5
1
vote
0 answers
Any way to circumvent Nexus carrier lock?
I have a brand new Nexus 5X locked to a Japanese carrier called y!mobile (run on the Softbank network). They won't unlock the phone unless I open up a contract and stay with them for 6 mos. This is not an option.
I tried two online unlocking…

xoihiox
- 11
- 1
1
vote
0 answers
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

arthur_v01
- 11
- 1
1
vote
1 answer
Unlocked Galaxy i7500, Reset Will Remove it?
Possible Duplicate:
Will resetting my unlocked phone to factory settings lock it again?
I just purchased and unlocked a Samsung Galaxy i7500 using FastGSM's system. (It cost $20 and it's used up; I can't redo it.)
I know my phone has an option to…

ashes999
- 396
- 1
- 3
- 18
1
vote
0 answers
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 Network Unlock Pin". My few friends say saudi sim…

Bala
- 11
- 1
1
vote
2 answers
Unlocking an HTC HD2 after installing android
I recently bought an HD2, which originally runs Win6.5. But currently has a very modern version of Android installed.
Is it necessary to re-install the original OS in order to unlock the phone?

Justin Alexander
- 161
- 4
0
votes
1 answer
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 an 8 digit password to change the PIN code, which…

Jules Collier
- 1
- 1
0
votes
0 answers
Unlocking device after factory reset
Device still needs previous google account after factory reset and I don't know the pin or Google account before resetting
0
votes
0 answers
When does phone locking occur and who locks the phone?
For some specific info, I bought a phone from Amazon in 2018:
Samsung Galaxy S9 Plus (6.2", Single SIM) 128GB SM-G965F (GSM Only, No
CDMA) Factory Unlocked LTE Smartphone (Midnight Black) - International
Version
After receiving this phone 5 years…

Jack J
- 101
- 1