Not all sip trunk providers support SMS check the guide: https://www.3cx.com/docs/manual/sms-text/
If this a supported VoIP provider with 3cx, in that, one that is also enabled with SMS, then you will add it in as per guides. But if this is an unsupported provider then there is nothing more we can help with.Thank you for your reply Charles, we were utilizing the sms feature with the existing sip trunk provider prior to the update to V18. Is this something you can assist us with or do we need to contact our Sip trunk provider?
As mentioned not all VoIP providers are enabled for sms. Please check the guide from my previous reply.Hi For some reason it doesn't show for us, would that be because of our chosen sip provider
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