CRM integration with SMS service provider

CRM integration with SMS service provider

Hello all, 
I am looking to send out promotional SMS/ text messages to some of my clients via Zoho CRM by using the web hooks feature.

Has anyone successfully integrated Zoho CRM with a text-message / SMS service provider?
If yes, please share any feedback, tips and advises.

Any help and advise is appreciated.

Kind regards, 
Bo Thygesen