An electronic device includes an interlocking mechanism for fixing a keypad to a housing of the device. The housing is coupled with the keypad such that the keys may extend to the edges of the electronic device and the edge keys are secured against being removed from the keypad. The edge keys may include a hook or locking mechanism coupled with the housing to prevent uprooting of the edge keys. Another set of hooks or lockings connect the housing with the keypad to prevent bulging of the keypad and to limit lateral movement between the keys or the keypad with the housing.