The Twillio SMS Reader for Un-subscribes/ Re-subscribes plugin allows users to be unsubscribed / re-subscribed from SMS's by replying with one of several given keywords. eg STOP. With this plugin enabled, Mautic will automatically put users who reply in the Do not contact list and also give them a tag SMS Unsubscribed.
It requires Twillio, and you will need your Twillio account details.
Clone this repo to /plugins/SmsreaderBundle in your Mautic install. The folder must be named SmsreaderBundle After copying, clear the Mautic cache
rm -r app/cache/*
Open up Mautic, and check that the plugin appears in the Plugins section.
You need to fill in everything under the Twillio SMS Reader menu item in the Settings Sidebar. It should be fairly self explanatory.
Twillio will have to make a request to the /sms/callback URI on your web server.