Have you tried dialing *228, then option 1 to reprogram your phone to the network and 2 to update your Preferred Roaming List?

This is a customer-to-customer forum, so you'd need to contact Customer Service to inquire about outages in your area:

Customer Service:

Dial *611 from a cell phone

(800) 922-0204

Monday - Sunday 6 am - 11 pm