South Africa is an extremely complex SMS market and numerous filters are in place. A large amount of messages are being blocked and so Vonage uses a direct connection along with adaptive routing to get around this heavy filtering and ensure messages are delivered.
Sender ID will be changed to a local South African number in order to ensure delivery. Alphanumeric SIDs are not accepted.
No adult content is allowed.
No political content is allowed.
No religious content is allowed.
Unicode is supported.
Concatenated messages are supported.
Other Features or Restrictions
Handset delivery receipts are supported.
Virtual Numbers have local reach, with the exception of Telkom (8.ta/Telkom Mobile).
2-Way Reach Limitation
Due to local agreements, to receive SMS on your long virtual number, you will first need to send to the recipient from the long virtual number. This is a one-for-one system only. You will not be able to receive SMS from numbers you have not sent to, and they will be dropped by the local network.
For more information, see the following articles: