If you ordered your watch from O2 direct it should have been sent out ready to go and not long after you set it up it should be good to go. If you ordered it elsewhere then you will need to set up a watch E sim account with O2. They will then send you an email to confirm it’s been activated. This can take up to72 hours. You will also need to ensure you are running the latest version of IOS in both your phone and watch. Additionally re set all network settings on your phone PRIOR to setting up your watch and linking it to your phone. Failure to this can cause connection issues.