I have an iphone 5 but won't activate?

I bought an iphone 5 won't activate i tried with every sim (verizon, tmobile, att) BUT STILL. After i try it says if can't activate contact apple support. I have but still didn't fix. I spent alot of $$ for a phone that dosent activate. Can any1 help!

Is it unlocked? You might need to call your service provider to have them update your account information. Its more than likely that the iPhone has not registered the sim, and can't get connectivity. The cell service provider customer support can help you get that set up.