Multi-Country SMS Sending
In order to send an SMS message to a phone number in a particular country, it is best practice to use a long code or short code that is from the same country. In fact, short codes can only send SMS to phone numbers from the same country the short code was created in.
To overcome this limitation, Subscription Groups can hold long and short codes from multiple different countries and will automatically use the appropriate short code or long code when targeting a user for SMS. Check out our SMS Subscription Group docs for more information.