Phone number formatting doesn't follow region but seems to follow translations instead.
When I type any number I always seem to get a phone number format that may be USA based. Even while on my system I changed the locale (LANG variable system wide) to my own country (nl_NL). I'm sure that that worked as typing 'set' in the terminal showed my LANG and LANGUAGE properly after a reboot.
LANG=nl_NL.UTF-8
LANGUAGE=en_US:en_GB:en
I expect that the dialer honors the LANG env var.
Edited by Tom Zander