Pakistan registers Sim cards after Peshawar massacre
Pakistan has ordered mobile phone users to verify their identities by getting their fingers printed for a national database.
They need to prove that the phone connections they own are registered in their own names. If they are not, their service will be shut off by 13 April.
This is one of the many anti-terrorism measures the government adopted after the deadly attack on Peshawar's Army Public School on 16 December, in which more than 150 people died.
The BBC's M Ilyas Khan went to see how it works.
21 Mar 2015