on 30-08-2015 19:32
Yes you can, call cs on 202 & if your on a refresh contract you just pay off what's left of your device plan then cancel your airtime plan without penalty then you are free to leave.
if you are on a standard 24 month contract just pay your monthly tariff x how many months left to pay
on 31-08-2015 13:02
You might want to think about getting your phone unlocked whilst it's free on contract.