Your Data Only SIM will activate the moment you add it to your device and it connects to our network.
However, we recommend putting it into a mobile phone first, so we can text you your SIM’s mobile number. You’ll need the mobile number to register for My3 or to use the Three app. You can use these to keep track of your data usage, and to top up your data when you need to. You’ll also need your SIM’s mobile number to sign up to our Three+ rewards app.