Make your Mobile Phones, MP3 plays and Laptops harder to sell if stolen, by following the UK police crime initiative.
Register your valuable property https://www.immobilise.com/
Keep a record of your mobile phone IMEI (International Mobile Equipment Identity) http://www.met.police.uk/mobilephone/imei.htm
Go to your mobile phone company website for extra security information - list below: http://www.met.police.uk/mobilephone/links.htm
If you are buying second hand gadgets or devices, check them against the database to see if they have been reported stolen.