Examples pertaining to switching between load-based mode and frame-based mode when operating in unlicensed band in mobile communications are described. An apparatus implemented in a user equipment (UE) establishes wireless communication with a network in an unlicensed band. The apparatus determines to switch between a load-based equipment (LBE) mode and a frame-based equipment (FBE) mode. The apparatus then switches between the LBE mode and the FBE mode in response to the determining.