Yes, if you keep going over your allowance then it’s probably a good idea.
You can move up to one of our other plans whenever you like without extending your contract. Simply log in to My BT where you can also see what you've used and choose the best option.
Got too much data? No problem, you can easily move down a plan at www.btcom.ll-digital-sandbx1.bt.com/mymobile.
If you have a mobile phone contract you may need to call us to upgrade your contract.