iPad Pro: diagnosing button and SIM card issues

Buttons and switches that stop responding

Check for debris or anything stuck, restart the device, then run the built-in diagnostic tests. On newer models, replacing the whole device or the display may be necessary depending on which button is affected.

Touch ID not recognizing a finger

Some people naturally lack the impedance needed to properly activate a biometric sensor — a normal phenomenon, not a device fault. Cleaning the sensor and making sure fingers are dry is the first move: moisture, lotions, sweat, oils, cuts, or particularly dry skin can all affect fingerprint recognition. Diagnostic tests then help isolate a genuine hardware issue.

A rejected SIM card

A message like "Invalid SIM card" usually comes from a carrier authorization issue or an incorrectly installed tray. Check that the wireless plan is active, and that the SIM tray model used exactly matches the iPad's.

A common baseline across all these symptoms

Clean the affected area, restart the device (normally, then with a force restart if needed), check the tech specs, run Apple's diagnostic suites, and consult the dedicated support articles before considering a part replacement.