I can’t really or an order to them as they’re all favorites of mine, but there’s a top 10:
Iron Maiden - Somewhere in time
Life of Agony - River runs red
At the gates - Slaughter of the soul
In Flames - Colony
Sentenced - Down
Black Sabbath - Master of reality
Iced Earth - Alive in Athens (I know this is cheating as it’s basically a best of album, but so what)
Kyuss - Welcome to sky valley
Queensryche - Operation mindcrime
Death - The sound of perseverance
Honestly though, I could put together a top “whatever” and still have too little space to place all the entries.
What can they do? How about making the cellular models modular? 3G goes bust? Swap the modem for a 4G one next time the car is in for service.