DataPlus and DataPro are two wireless data plans which are recently announced by AT&T. DataPlus will cost 15 pounds and DataPro is going to cost 17 pounds.The iPhones are going to have new tethering options now.
The iPhone owners tend to choose DataPro plan which will enable tethering at 20 pounds on monthly basis
If you travel overseas frequently you will have the added advantage of being able to avoid extortionate roaming charges simply by placing a domestic sim card in your iPhone and only paying local call charges for your service in the country you are visiting.