Telephone and mobile phone SCAMS

Telephone and mobile phone scams are going around.
For example, you may get a phone call saying you won a cruise, and to claim your prize you have to press a number on your phone. This will pass you to a line for which you have to pay dearly - and no prize.
Or you get a short phone call (they don't really wait for you to answer) from some number (e.g., +88213229003) on your mobile. The hope is that you call back - for a hefty fee, of course. These 88213 calls are usually a scam. 88213 is a virtual country code to Telespazio S.p.A. in Italy, see this link. The 88213xxx callers try to lure you to call back, and you would have to pay quite a lot for it (e.g., 9 Euro/min). See also this list of suspicious numbers:
whocallsme.com