To find the model of the device you want to trade in, you can check its settings.
For Apple, model numbers can be found:
- On the back-side of a device
- By going to: Settings > General > Information
For other manufacturers, model numbers can be found:
- By going to: Settings > About the device
- For some devices, you can find the model number directly on the backside of the device or under the battery cover
- On the original box (if you still have it)