In case you didn't know already........
On answering the telephone you will hear a recorded message congratulating you on winning an all expenses paid trip to an exotic location. You will then be asked to press 9 to hear further details. If you press 9 you will be connected to a premium rate number that costs approximately £20 per minute. (Even if you disconnect immediately after pressing 9, it will remain connected for a minimum of 5 minutes, costing you around £100.). HANG UP ON ANY UNSOLICITED "FREE OFFER" CALLS.
A missed call shows up on your mobile. The number is 0709 020 3840. The last four numbers may vary, but the first four numbers will stay the same. If you call this number back, you will be charged £50 per minute. BEWARE, DON'T CALL BACK NUMBERS STARTING WITH 0709