Open M2M uses a flexible SMS delivery policy, as IoT devices have different needs from SMS as traditional cellphones, we describe how our delivery policy operates below.
Incoming SMS follows the following delivery policy
After 18 hours the SMS expires, this is to avoid overloading the network.
An outgoing SMS is processed and handed over to the remote operator of the number you're trying to reach.
Please note that toll numbers are blocked.
* Network registration SMS delivery may not be guaranteed if your device maintains connection for only a short time (e.g. less than 10 seconds).