If your not already aware If you're under 24, you're in. With U24, you get an extra 1GB of data and unlimited UK calls and texts to your friends on Orange and T-Mobile. Just for being under 24. To qualify, you just need to be under 24 and top up by £15 or more on Orange pay as you go, or be on a pay monthly plan worth at least £15. See who you can call and text for free by downloading our handy U24 app or check a few numbers to see if they're on Orange or T-Mobile with our online tool.