Premium rate numbers are for services like specialist help lines, TV voting or competitions by phone, charity text donations, and so on. These numbers are more expensive than standard calls or texts and charges can quickly add up.
Can I turn premium rate calls off?
To avoid racking up big charges for these services, you can turn off premium calls on the "Tools to manage your spend" page at www.bt.com/mymobile >
And you can't dial UK premium rate (09) numbers from abroad anyway.
Calls to 0800 numbers are also free with BT Mobile.
How do I stop unwanted premium rate texts on my mobile?
Reply to the sender with the single word 'stop'. The regulator of premium rate services is PSA (Phone-paid Services Authority). They used to be called PhonePayPlus.