Got a thing for 4G devices with full-QWERTY keyboards? Samsung’s Epic 4G not your cup of tea? Listen up. The HTC EVO Shift 4G handset, which is destined to make waves with wireless provider Sprint, has surfaced in a RadioShackÂ advertisement. The device is priced at $449.99 at full retail and $149.99 for those upgrading or opening a new line. The Consumer Electronics Show begins next week, hopefully this 3.6-inch slider gets its official reveal then.