I went to my local BBY today to see if they had the iPhone 5 they only had the 64gb and in black so i got it....but when it goes to sleep it goes to LTE even when on wifi. is there a way to keep it on wifi?
Nope.
It does that to save battery. When you're not using it wifi turns off.
Leave it plugged in the charger and it might retain the connection longer even when it goes to sleep.