Your balance will be shown on your overview page, as soon as you login if you can't see this, you will need to link your number to your account You can do this by clicking 'Link your Asda mobile number' from the right hand navigation menu Alternatively, text 'BAL' to 2732 (free of charge) to check your balance, or call 2732 (free of chargeTop up over the phone on 2345 free from your Vodafone Pay as you go mobile To top up again, text TOPUP to 2345 with the amount you want to add and the last four digits of your payment card (for example, text TOPUP 10 1234 to add £10 using a card ending in 1234) Top up automatically It's simple to set up an automatic top upChecking your balance The easiest way to check your balance, is by signing into My O2, online or through the app Otherwise, you can try one of the following Press Hotkey 2 on your mobile phone Key *#10# then press the call button Dial 4444 for free from your mobile Remember you need at least one minute of call...