Hello @bobikaskestutis ,
Welcome to the community,
If on contract, you will have to ring customer service to cancel your contract.
If on pay as you go and do not want to keep your number, just do not use it, if you did want to move it to another network, just get a PAC code.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using web based app or another phone: +44 800 079 8586 or +44 800 956 6000.
