I've been out of the UK for years and now I'm back I need a mobile phone plan. I'm familiar with O2 on a pay as you go service and can see their deals online so that looks pretty straight forward. However, when I look at Money Supermarket I can get a much better deal with companies I've never heard of that have the same O2 deals. Can I trust Money Supermarket not to put me in touch with shysters?