Samsung Samsung Repair Center in Plano, Texas said they repaired my phone but didn't Internet

  I purchased a Samsung Galaxy Prevail and within 2 weeks the phone started messing up.  While carrying the phone in my case it starts beeping and shows it is charging (has not plugged in to a charger for hours) with a percentage charged.  I sent the phone in for repair and was without a phone for 8 days.  I received the phone from the repair center with a ticket showing the phone had been repaired, only to charge the phone and within 2 hours it starts doing the same thing that they claim to have repaired.  I have read some reviews on this particular phone and it seems that quite a few other consumers are having the same issue with their phone.  I am currently requesting a replacement and refuse to send it in for another Repair!