When you get a new iPhone or iPad, often the Testflight app will not appear on your device anymore.
Here’s how to fix this, and register your new device so you can once again install beta apps:
1. Open Safari and go to testflightapp.com/login. Enter your username and password to sign in
2. Now tap “connect device”, you will be taken to the settings app, remember to tap the “install” button to complete the process. You may be prompted for your device’s PIN if you have one active
3. Optionally, click the menu button up the top left and select “device information”, remove any devices you no longer own
4. Now wait – your developer will need to send out a new build that is compatible with your new device