currently running 4.3 on Sprint and after a month with this device I finally noticed why I didn't have reception everywhere I went like I had when I had my BlackBertry device on Sprint. Roaming was turned off! Turning it on to allow roaming and turning off roaming guard the device actually has reception in some areas becuase of roaming, gowever this setting doesn't stick. not sure the exact time interval, but definitely after restarting the device roaming gets urned off completely! I do notice a quick flash message on the screen about the SIM card and I'm wondering if anyone else had/have his problem or is it just me?