Mexico has decided to build a law beginning in April, to require mobile phone companies to build up a fingerprint database of their clients, with the idea being to "match calls and messages to the phones' owners. It's been said that there are around 700 criminal bands in Mexico, many of which use prepaid handsets in order to take care of business. And if you lose your phone or decide to loan it out, you've have to "report it immediately to avoid being held responsible for a handset used in a crime.

via: Mexico to fingerprint cellphone users to fight crime - Engadget Mobile