I have a Samsung galaxy nexus I believe, it's not the latest one but the one before. Its a very good phone and easy to handle. £25 a month a month for unlimited texts, 200 mins (which I barely use but you can get more for exchange of something else) , and 750mb of my internet which is ace. I also was offered a panther package or something along those lines. Free sky sports on your phone and a free music app which I use daily. This was from phones 4 u.
Failing that, I had an iPhone 3g before that, was easier to use but bit more pricey at the time. Both will work magic for you.