Unlocking android phone

[Bhan]

Finished my contract with O2 a few years ago and had recently moved to another network. I have another phone but want to use my O2 phone for my other sim. How do I get my O2 phone unlocked? Many thanks

[Bhan]

Finished my contract with O2 a few years ago and had recently moved to another network. I have another phone but want to use my O2 phone for my other sim. How do I get my O2 phone unlocked? Many thanks

[MI5]

@Bhan 

How to Guide: Unlocking an O2 phone to use a different SIM card 

[Bhan]

Hi
The O2 phone (Sony experia) I want to unlock is not my current phone. I haven't used my Sony Experia since last year. I have only transferred my mobile number to my current phone which is with another network provider.
Will the unlocking guide you sent work for this situation?
Many thanks

[jonsie]

It will work but you may have to go through the Pay and Go option now.

[MI5 · Accepted solution]

@Bhan 

Try the manual form first.