0 Twilio SMS to international number not working 2 Dillan Cagnetta posted 9 Years Ago Ok, i have read all the other issues regarding twilio. The problem why SMS are not being sent to international numbers is because Rock does not save the "+" in the phone field. When testing on twilios site, when i added the "+" it worked. when i removed it, i got this error Response 400 BAD REQUEST - The data given in the POST or PUT failed validation. Inspect the response body for details. { "code": 21211, "message": "The 'To' number 27xxxxxxxx is not a valid phone number.", "more_info": "https://www.twilio.com/docs/errors/21211", "status": 400 } Could you please allow the + symbol in the phone number field. It will solve this