The invention provides a method for positioning a user equipment. The portable electronic device can be operated in a mode #1 in which the operation of the non contact type IC module is permitted while the operation of the HDD section is prohibited, or in a mode #2 in which the operation of the non contact type IC module is prohibited while the operation of the HDD section is permitted. The electrical lead is also pre-biased to expand from a collapsed state to an expanded state to mechanically engage an internal wall of a blood vessel.