Sender ID:
MTS Serbia (22003) - Alphanumeric sender is supported; Numeric sender will be overwritten to "Verify" to ensure delivery.
Short code and long code sender IDs are not supported.
Generic senders will be changed to ‘verify'.
Content:
There are no additional content restrictions beyond those in our Acceptable Use Policy
Other features/restrictions of note:
Delivery Receipts:
Handset delivery receipts are supported.
Links:
Global SMS Features Overview (Outbound only)
Global SMS Numbers Features Overview