Flexible smartphone displays will allow vendors to stretch the boundaries of handset design and launch exciting new devices that challenge us to rethink what a smartphone really is… some day. For the time being, they bring us banana phones. LG recently debuted the “first real curved smartphone” but in doing so, it didn’t share any information as to when the G Flex might make its way to U.S. shores. We may now have preliminary details on the banana phone’s U.S. invasion, however, and they come from serial smartphone leaker @evleaks. According to a single short and sweet tweet, the G Flex is confirmed to launch on at least three major U.S. carriers — ATT, Sprint and T-Mobile. The odd man