Sony phones have an unlock counter which only allows a certain number of unlock attempts before the phone is unable to be unlocked. 

In order to check the remaining number of unlock attempts please follow these steps:

 To do this in most devices key #987654321# into the device or as below

 1. Turn on the phone without sim card

 2. Type *#*#7378423#*#*

 3. Select Service info

 4. Select SimLock

 5. Check where is X

 6. If X is on NETWORK and value is different than 0, you can unlock your phone.

 7. If it is 0 unlock by code is NOT possible.


Mobicode Support