can I sell my contract phone?

[NikkiB]

Next week my year long contract with a phone company expires and I am writing to them to state that I don't want to renew the contract. I've decided to buy a new phone and return to pay-as-you-go. But someone wants to buy my contract phone. Is it mine to sell? And how do I ensure that I won't be charged for calls the new owner makes on my old phone? What happens to a phone's viability/connectivity once the contract has ended?

[fo3nix]

Once the contract ends (and you have some proof of this, presumably), then it should be yours to sell.

[dodgyshirt]

Yes, it is yours to sell. But, remove the SIM card after having completed your contract so there is no possibility of you being charged for calls