Method for a secure detach procedure in a radio telecommunication network

Disclosed are devices, systems and methods including a wireless terminal adapted to perform a detach of the wireless terminal when registered to a telecommunication network by associating an identification for the wireless terminal, deriving a signature for the identification, and allocating a pair containing the identification and the signature to the wireless terminal. The wireless terminal includes a transceiver adapted to send a detach request including the identification and the identification signature from the wireless terminal to the network in response to detection of a predetermined state of the wireless terminal. The predetermined state includes one or more of, for example, a power off state, a low battery state, and/or a removal of a subscriber identity module from the wireless terminal.