Unlock Xperia

[CMC68]

I've just bought a second hand Xperia phone locked to o2. The previous owner said they had not completed their contract. Can I still unlock it

[Cleoriff · Accepted solution]

@CMC68 

The unlocking process is here Guide: Unlocking an O2 phone to use a different SIM card 

However, it should be the previous owner who does the unlocking process.