Like to upgrade to a iphone 5s but i have a balance on my iphone 4 s can i upgrade or not

[SuperFred]

Hi, normally, you can upgrade at anytime but in order to get a credit on your new hardware, your actual balance must be at 0$.

[tsizzle · Accepted solution]

You can upgrade at any time by paying off your remaining device balance. Also, if you are taking a new high-end smartphone you will be required to spend >$70 per month as the contract is now only 2 years vs. 3.