Free O2 Sims Pay monthly contracts offered by major mobile phone networks in the UK give you a chance to own a new mobile phone for free or for a minimal amount. But what if you already have a mobile phone of your choice? Would you still need to sign up for a pay monthly contract in order to enjoy the services of a certain network? The answer is no. What you do is buy a sim card with pay monthly benefits. For example, you can get one of the free O2 sims available today from Mobile Phone Deal. When you sign up for an O2 sim pay monthly plan, you will be given a free O2 sim card. No matter which deal you end up getting, you will be able to avail of a free O2 sim. Aside from the sim being free, there are also other great things about these free O2 sims.