For Apple Devices (iPhone, iPad, iPod):
Go to Settings → General → About and look for “Model Name” (e.g., iPhone 12 Pro Max).
You can also check the back of the device for the model number (starts with ‘A’).
For Android Devices:
Go to Settings → About phone → Model name or Model number.
On Samsung phones, this may appear under Settings → About device.
For MacBooks or Laptops:
You’ll find the model information printed in small text on the bottom of your MacBook.
Model numbers usually start with A (e.g. A1489).