This question has vexed the forums but the answer is very simple: 1. Make sure you have joined BT's on-line billing with your main phone/broadband account 2. Look up the direct debit reference number at your bank for your new BT Mobile account (starts GB********) 3. Go to you BT account and add account 4. Use the reference number and your Mobile number and there you have it -usage monitoring Note: the monitoring lags by about 24 hours so beware! Technorati Tags: BT Vision,BT Boradband,BT Anywhere ......