Wing (www.wingalpha.com) is a prepaid wireless brand that provides service using Sprint’s network and the AT&T network. Subscribers on the Sprint network will have access to free domestic voice roaming on Verizon. AT&T based subscribers do not get the roaming feature. Unlike most other cell phone carriers, Wing offers its customers a refund for any unused data that they may have in their account at the end of a billing cycle. So if a customer subscribes to a plan with 2 GB of data in a month but only ends up using 1.5 GB, they will get refunded the price difference for the cost of that unused data.