Do we need to support separate fees for non US countries listed here: http://en.wikipedia.org/wiki/North_American_Numbering_Plan

I'm asking because https://github.com/dimagi/commcare-hq/blob/caa05a99430306b5cb69b1e8cbb75af06039a960/corehq/apps/smsbillables/models.py#L225 returns a country code of "1" for any of these countries, eg 1-242-xxx-xxxx (for The Bahamas) yields country code "1" and thus is not distinguished from the US.