I have two basic phones. One I purchased about 10 months ago in conjunction with a prepaid plan. I was unhappy with the prepaid service and wanted to switch back, but I was told I had to wait six months before I could use the phone for a regular plan. So I used an old phone. It is beyond that six month period, and I want to switch my service to that newer phone. Can I activate it myself (*228), or must I go to a Verizon store? Will my service service automatically switch from one phone to the other?