SMS & credit
SMS is US/Canada only for now
sms_unsupported_region
During the SMS preview, attn can only verify and send to +1 (US/Canada) mobile numbers.
HTTP 400·SMS & credit
What it means
What happened
During the SMS preview, attn can only verify and send to +1 (US/Canada) mobile numbers.
Why
Why it might have happened
- The number was outside the +1 North American numbering plan.
- Other regions are not enabled while SMS is in preview.
Next steps
What you can try
- Use a US or Canadian (+1) mobile number.
- Use Telegram or browser push for other regions.
Related
Related error help
Still stuck?
Get help
If the error keeps happening, contact support and include sms_unsupported_region plus what you were trying to do on attn.ca.