So every dialer code/hardware code I used to try, used to work, I'm certain.
Now I do a search and notice all of these format codes:
*#*#NUMERICCODE#*#*
NONE of them work, for example:
*#*#4636#*#* Phone info
*#*#526#*#* WLAN Test
*#*#232337#*# Displays Bluetooth device address.
But...