What is the deal with Twilio and International SMS? -

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i've been working twilio program sms functionality on app, , seems twilio works best numbers , not international numbers. i've done research , have learned august 16th fiasco resulted inthe sms functionality being shut off twilio. through testing have learned international carriers not supported twilio. of friends abroad aren't receiving twilio sms messages.

can provide further insight issue? international sms supported twilio? if not, how many carriers , ones supported? there better sms service provider can guarantee full support if not more prevalent carriers internationally?

thanks support , clarification on issue.

good questions - information can kind of hard find on our website right now. if i'm picking you're putting down correctly, you're curious kind of availability twilio sms has internationally , deliverability like.

the matrix on kind of twilio service available can little complicated (which have here little buried in our faq: http://www.twilio.com/help/faq/phone-numbers/which-countries-does-twilio-have-phone-numbers-in-and-what-are-their-capabilities), sms breaks down this:

  • twilio phone numbers can send , receive sms available in us, canada , uk.
  • us , canadian numbers can send , receive 190 countries on 1,000 carriers. see pricing each country , carrier per message, check out page: https://www.twilio.com/sms/pricing
  • uk numbers can send , receive sms reliably within uk. numbers geographic, international carriers not allow messages sent or received them. might possible root cause of deliverability issues experienced.
  • all other phone numbers make available in other countries have support twilio voice - these numbers cannot send or receive sms @ all.

i'm not aware of sms related incident on 16 august, though did have intermittent service interruption week before on 9 august lasting little under 90 minutes. future reference, communicate our service issues on independently hosted status board here: http://status.twilio.com/ issue, root cause , resolution posted there review.

finally, if have specific question number, deliverability particular carrier or handset, or share cool hack, encourage engage one-on-one our support crew @ help@twilio.com or come meet 1 of fellow developer evangelists when you're out @ programming event. we'd love see you're working on , if there can help.

thanks kev!

rob - devangel @ twilio


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