64803 Telecel, numeric and generic sender IDs are not supported.
Content:
There are no additional content restrictions beyond those in our Acceptable Use Policy
Unicode:
Unicode is supported.
Concatenated messages:
Not supported
Other features/restrictions of note:
Delivery Receipts:
Handset delivery receipts are supported except for concatenated messages.
Links:
Global SMS Features Overview (Outbound only)
Global SMS Numbers Features Overview