We do not recommend using a 3rd party application (OTT) to text a Community number. WeChat, Facebook Messenger, WhatsApp, and TextNow.com are common 3rd party messaging apps. Any service that requires you to have a wifi/internet connection to send messages will experience issues with message deliverability.
If you are using anything other than your phones default text messaging capabilities, the deliverability of messages from a Community number will vary. These apps do not work the same way as regular SMS messaging, so we cannot guarantee that messages will be delivered.
Unlike normal SMS, these apps can only process 1 message segment per second, resulting in messages being undelivered, incomplete, or received out of order.