Sim switch

[Eileen1974]

My galaxy s6 battery is poor. My husband (vodafone customer) has an old S6 I want to use instead as he has since upgraded. I put in my sim but it advised it was locked. We contacted Vodafone to no avail as the old phone is not connected to his account anymore. Is it my sim that is locked or the phone? In current circs I can't speak to anyone about it to resolve and need a reliable phone

[Cleoriff]

@Eileen1974 

It's the phone which is locked to Vodaphone.

O2's guide on unlocking is here

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

[MI5]

@Eileen1974 

Only Vodafone can can unlock it, not O2 but if they won't you can usually get unlock codes cheaply off eBay.