Report a lost or stolen phone straight away
If you’re on a contract and you lose your phone or it’s stolen you should report it to your mobile phone provider immediately so they can block it and stop anyone else using it. If you don’t tell them straight away you might have to pay for any unauthorised phone calls, which can be very expensive.
Some network providers have signed up to a £100 'liability cap', which means you'll only be liable to pay for the first £100 of your phone bill if your phone is lost or stolen. This cap is only activated if you report your phone as lost or stolen within 24 hours of going missing and you may still be liable for any calls made using your phone until you have reported it or any calls made to an international number.
Report My Loss
If a reference number is required to claim a replacement from an insurance provider, this can be obtain by reporting this through Report My Loss. This is available here https://www.reportmyloss.com/uk
Set a cap
Ask your provider to put a cap on the amount of charges that you run up outside of your tariff. You might also consider asking your network to bar calls to international and premium rate numbers.
Set a Pin
Set a pin on your handset to make it harder for anyone to use it. This won’t stop fraudsters from taking out the SIM card and using it in another phone so set up a pin on your SIM card as well.
Register your device
Keep a record of the make and model of your phone along with the IMEI number. You can get your IMEI number by keying *#06# into your handset.
You can also use this to register your device on www.immobolise.com, the world's largest free property register. It can be used by members of the public to register your valued possessions. Anything with a bar code or serial number can be registered, and these items are then linked to the National Mobile Property Register (NMPR) which is used by all UK Police forces to trace owners of lost and stolen property.
Found a mobile phone/tablet
If you have found an electronic device, mobile phone or tablet that may contain personal data you should hand the item in to your nearest Public Enquiry Counter.