16M3 OrangeUser ManualInserting and Removing USIM CARDInserting USIM CARDCheck USIM CARD provided by the membership mobile center.s Remove the battery on the back of the lower part of the Main Unit.s Insert USIM CARD with the terminals facing downward.s Insert the battery and cover the Ribbon, tighten up the battery cover.s Turn on the power of terminals and check if it is installed correctly.s