Is there anyone else having issues with the wifi dropping out once connected? Or Bluetooth in the phone not picking up any devices? This makes the third iPhone 5 that I have since my original purchase on 10/01/2012. I connect the phone to wifi, it picks up, & then drops the connection. Seconds later, the wifi connects again. The Bluetooth has never worked, it searches & searches but finds nothing & my roommate has a 4S and hers picks up devices nearby.