SIM Only Query

Sim Swap

Sim Swap Request

Process Summary:
This process can be used when a customer is looking to replace a lost/stolen or faulty sim card with the same mobile number.

The Process:
Customers will be able to request a replacement sim card by using the Three App or by visiting a Three Store (with valid photo ID). More instructions below:


If the customer would like to activate through the Three website:

  • Login to your Three App
  • Go to Account
  • Tap Help
  • Select Replace SIM
  •  Enter the required details and press submit

If the customer would like to visit aThree Store: Check Store

Cancel Contract

Other Query

Personal Customer:
Line are open 08:00 to 20:00 Monday to Friday, and 09:00 to 18:00 Saturday to Sunday

Personal customers:


  • From your Three phone
    333

  • From any other phone
    0333 338 1001

  • From abroad (standard roaming rates apply)​
    +44 7782 333 333

If the customer would like to visit aThree Store: Check Store