Can i still use my iphone 4?

My phone is getting sut off and i was wondering if i connect to my own internet if i can still use it. Like i can donwload texting and calling apps because i got a itunes account and i got facebook?

Iphone 4 is very good phone. Better use it. Update the software. If updated, you can enjoy the new interface!

On Wi-Fi, yes. Otherwise, no.

And please pay more attention to your school work. You are NOT ahead.