Compatibility summary
You will need a travel adapter in Andorra; plug types used there differ from Mexico. Voltage differs by more than 20% — a voltage converter may be needed for some appliances.
Plug comparison
Mexico plug types: A B
Andorra plug types: C F
There is no common plug type between Mexico (A B) and Andorra (C F). You need a travel adapter.
Voltage comparison
Mexico: 127V, 60Hz
Andorra: 230V, 50Hz
Voltage converter recommended (Mexico 127V vs Andorra 230V).