Keep iPhone 5s or upgrade to 6s?

Should I keep the 5s until the 7 comes out next year or upgrade to the 6s?

I would upgrade to the next version just because 5S is still worth alot so its worth alot on trade in, on a new contract is would be almost a free upgrade.

I would probably keep the iPhone 5s due to the fact that it's still a pretty powerful device and probably will be for another few years. It will give you a chance to wait till newer phones get cheaper as they get slightly older before you decide to get an upgrade.