[bdarnell]

India has a strictly-enforced national do-not-call list (among other limitations). Twilio cannot send messages to numbers on this list (other SMS providers are probably in a similar situation). Github probably decided it's better to disallow Indian numbers completely than let you sign up with a number that may not work when you need it. http://www.twilio.com/help/faq/sms/are-there-limitations-on-...

[nothingsTrivial]

We do send a test message before SMS 2fa is enabled. I just enabled support for +91. But given the other limitations in that article I'll need to keep an eye things.

[mdpye]

All SMS providers are in the same boat. IIRC, the penalties for breaking the DNC list in India are brutal. (until recently I worked at a big mobile aggregator)