: Select the MCM device from the list. When prompted for a PIN or passkey, enter one of the codes listed above (try MCMAU or 500500 first).
I can then give you the precise code or fix. mcm bluetooth code
iOS sometimes auto-generates a 6-digit code that does not match the headphone's expected 4-digit code. : Select the MCM device from the list
: When prompted, try 500500 first. If that fails, try MCMAU (ensure your phone's keyboard isn't automatically capitalizing or adding spaces). Troubleshooting Connection Issues Amazon.com Customer Questions & Answers - Amazon.com iOS sometimes auto-generates a 6-digit code that does
When a diagnostic tool fails to communicate with the MCM via Bluetooth, or when the MCM itself logs a communication fault, it generates a code. These are often displayed in hexadecimal format.
This is rare but usually indicates a firmware glitch or a counterfeit product.