apple iphone 4s will take into account any swap

Description:

Looking to swap my phone i have just changed providers to o2 so the phone is locked to vodafone.

so looking to swap for anything that will take an o2 sim most things considered try me

it works perfect there is a crack on the front screen but does not effect working and has not gone through to the lcd.

its locked to vodafone, 16gb, comes with box and charger,

any questions please do ask.