As with many destinations in the Middle East, Oman is a difficult market to deliver messages to. Numerous filters are in place to block SMS and even legitimate A2P traffic can often blocked. To prevent filtering, Nexmo is pleased to inform you that we have a direct route into all networks in Oman (MCC=422).
This is a high-quality route which supports handset delivery receipts. Please notice that Sender ID will be forced to MAC or NXSMS to ensure delivery.
Additionally we strongly advise you not to send messages using Arabic characters as operators often cannot deliver them. We would recommend that you send using standard GSM8 in the body of your messages and avoid using Unicode.