Where can I get a list of the programming codes for the 3650 that I sometimes see mentioned (i.e. firmware version etc)?

Thanks!

Not sure if this is what you're after but...

*#06# - Displays the IMEI number
*#0000# - Displays the firmware version

As far as I know these are the only two code that work on the 3650. They have either removed or changed the code for the service menu (*#92702689# on most older Nokias)