Sure Mobile has issued a statement after a teacher in the Isle of Man called for action to prevent people using mobile phones to make malicious calls.
Andrew Shipley from St Ninian's High School believes there should be tighter controls on the ownership of SIM cards, with a requirement for everybody to give their name and address at the time of purchase.
Mr Shipley, the local representative for the ATL teaching union, received months of silent and sexually explicit calls in the early hours of the morning.
The statement from Sure reads as follows (text, below, from attached audio file):
"It disappoints Sure to hear that some people use mobile phones to make malicious and prank calls and we understand how disturbing these can be.
"We actively cooperate with any police investigation into mobile phone misuse and can assist in tracing ownership of offending callers if they have registered their mobile number.
"Unfortunately, in the Pay as you Go market the speed of service means that most SIM cards and therefore their numbers are not registered. Therefore, unless someone has actively advertised this number either in a directory or listings of some kind we cannot assist in tracing the offender.
"Sure actively encourages people to register their phone as it gives customers the added benefit of topping up online and also an ability to trace them should they lose their phone."
(Note: Statement read by Manx Radio employee).