Unlocking Sony F5121

For unlock Sony F5121 following options are available. If you don't know which option use for unlock your phone, please contact us. We will help you choose the right product for your phone.

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UNLOCK Sony F5121


What our customers say about unlocking

  • Everything works

    Jaroslaw - 2018-02-23 11:26:13

  • Fast unlock code

    Jaroslaw - 2018-02-23 11:24:41

  • Perfect fast unlock thank you 😀😀😀

    Jaroslaw - 2018-02-23 11:20:32

  • Quick and fast, Best One

    Janusz - 2016-08-13 01:19:32

  • perfect

    raffaele - 2016-07-21 18:36:57

Unlocking instruction for Sony F5121 ?

How to enter a network unlock code in a Sony F5121:

1. Turn on the phone with an unaccepted simcard inserted (simcard from a different network)
2. Phone should ask for network unlock code
3. Type NCK code in order to unlock the main network like T-Mobile, Orange etc.
Type SPCK code if the phone is locked in a subnetwork like Tesco.

How to check SONY F5121 code counter:

1. Turn on the phone whithout sim card
2. Type *#*#7378423#*#*
3. Select Service info
4. Select SimLock
5. Check where is X
6. If X is on NETWORK, SUBSET or PROVIDER and value is more than 0, you can unlock your phone.
7. If it is 0 unlock by code is NOT possible. The counter is blocked.

If the code counter shows all 0 it cannot be unlocked, because there are no tries left to unlock it.

Sony F5121 counter

Second way to check counter

1. Turn on the phone whithout sim card
2. Lock screen
3. Press sequence: Menu, Back, Back, Menu, Back, Menu, Menu, Back
4. Select Service info
5. Select SimLock
6. Check where is X
7. If X is on NETWORK and value is different than zero, you can unlock your phone.
8. If it is zero unlock by code is NOT available. The counter is blocked.

Network unlock code or Sim pin network code is a special type of code which removes the network blockade from your Sony F5121.
These messages will appear on the screen of your Sony F5121 when you insert an unaccepted simcard.
Sony F5121 has a limited amount of unlocking attempts. Usually all Sony F5121 have 5 tries. If your Sony F5121 has a blocked code counter, there are no tries left, you cannot unlock this device by code.
Important !!! Sony F5121 with a blocked code counter will still ask for a network unlock code.
Even if you enter the correct code it won't work with a blocked code counter.

The code counter can be reset only by an official Sony service.
Sony F5121 needs different types of unlock codes to remove the network blockade.
One of these codes is a NSCK code which is used in most Japanese networks like Docomo, Softbank etc.
Those networks cannot be unlocked with the standard NCK code.
Sony F5121 usually asks for this code as soon as you insert an unaccepted simcard ( from a different network ).


2018-02-23 11:26:13 Jaroslaw

Everything works

2018-02-23 11:24:41 Jaroslaw

Fast unlock code

2018-02-23 11:20:32 Jaroslaw

Perfect fast unlock thank you 😀😀😀

2017-07-09 20:34:20 Haderer

Efficace et rapide merci

2016-08-13 01:19:32 Janusz

Quick and fast, Best One

2016-07-21 18:36:57 raffaele