This could be the final week for mobile virtual network operator (MVNO) Amp'd Mobile, which had previously filed for chapter 11 bankruptcy last month. Last week Verizon Wireless, the carrier that provides the network services for Amp'd, had petitioned a judge to allow it to cease services to the MVNO. Amp'd had been behind on the charges it owed to Verizon, and it is the same even for MVNOs. You don't pay your bills, the service is cut off.
Where this leaves Amp'd Mobile's customers isn't so clear, but at this point it would be a good idea to consider looking for a new carrier.