Sender ID:
Alphanumeric Sender IDs will be overwritten to a random numeric value to ensure delivery.
Content:
There are no additional content restrictions beyond those in our Acceptable Use Policy
Unicode:
Unicode is supported.
Concatenated messages:
Concatenated messages are supported.
Other features/restrictions of note:
Delivery Receipts:
Delivery receipts are received from the operator only, in asynchronous mode and so should not be used as a true measure of quality.
Links:
Global SMS Features Overview (Outbound only)
Global SMS Numbers Features Overview