|All Sender ID will be overwritten to Long Code
|China Mobile, China Unicom, China Telecom
|Support for Concatenated message
|5-10 Business Days
|Support for Two Way SMS
|Yes (Long Code)
|There is no specific regulations
The following types of messaging on all SMS messaging products are all prohibited:
Signature and content template whitelisting is required. Signature is considered the Sender ID with either【】or  bracket, and it will be in front of the message.
【8x8】Your OTP content is 123456.