O2

There's no difference between using it in England and in France, right? Speed and extra cost.

If I Bolt-ons it once and use up all that data, can I charge it again in a week?Is there a limit to the number of bolt-ons?

My first time £10 top up is fail. But my money already paid.So I try £10 again. Finally, succeed.But in my balance, there is only 10 pounds. My other 10pounds is gone. How can I solve this problem?I called 4445. But there is no complete anwers for me...