Atomic Books: Atomic Books - Confessions Of An Ugly Stepsister ...When you have made up your mind that you want to sell your used or broken mobile phone in the UK, then you do not worry because you will be able to sell your phone for cash. The process for dong this is very simple, and it is broken down into three simple steps. First, you have to register on the website that you want to sell your mobile phone. This is done entirely on the website, and it is a very simple and intuitive process. You will be able to enter certain details such as contact details that will enable you to be allowed to advance to the next step. The second step sis to post your phone. This is a very simple process because you just need to get the address from the website, and actually posting your phone. Finally, you will receive your payment the same day you post your phone.