How can I pay using My3?
Login to My3 at https://my3account.three.ie
Click on Billing & Payments>Ways to Pay >Pay bill by card now
If you haven’t already registered your card details you’ll be asked to do this first. You can register up to two payment cards.
Otherwise you’ll simply be asked to confirm the amount you want to pay, the payment card you want to use & need to enter your card security code. That’s it – payment will then be automatically taken.