SMS to China doesn't work, can you fix it?
Tried several times, all failed, and I confirmed mobile number includes the country number, +86 .
If you've typed your phone number in this format: +86123456789 (that is - with no spaces or dashes within the number) and used the "Send a test" option in the Settings -> Reminders section 3 times - once while using each of the 3 available outgoing hosts (the US and two Canadian hosts - they can be selected from the "Number to send from" drop-down menu) and it still doesn't work, please send your full phone number to firstname.lastname@example.org
We will send 3 test messages through our system and if none will arrive, we'll contact our SMS provider about this issue.
Alternatively, we recommend to use push notifications with our mobile apps - for Android or iOS.
changed the outgoing host from US to Canada, the problem go away. and suggest to optimize the outgoing options, which is not easy to find.
The providors of canada works.