Looking for a quick and easy way to top up your 3 mobile phone credit? Adding credit to your 3 account with an online prepaid card is a walk in the park! Once you receive the code from us, simply redeem your 3 Top Up online via My3. This can be done anytime and worldwide whether for your own account or as a gift to someone else. Redeem your Three Top Up Code using any of the below options: 1. Call 444 for free from within the UK and follow the verbal instructions. You need to select “Top up by voucher” and enter your 16-digit code. 2. Call +44 7782 333 444 if you are using another phone/outside the UK. 3. Log into My3 and follow the instructions in “Top up your account.” 4. Use the web direct top-up option provided by Three that does not require logging in. Just enter the number you’d like to top up, select “Voucher” and hit “Top up now.”