Generic and numeric senders are not allowed, therefore you must use alpha sender IDs to send traffic here, ideally your company name.
No Adult content is allowed.
No Political content is allowed.
No Religious content is allowed.
Other features/restrictions of note:
Handset delivery receipts are not reliable for any of the networks.
Reliable handset delivery receipts - No
Dynamic SenderID - No
Unicode - Yes
Concatenated Messages - Yes