The SMS radio alarm receiver-SMS pager app is a very simple app that allows it to connect to certain SMS (e.g. Alarmages Fire Brigade) to respond with a response without typing anything.
Feedback on alarm via SMS radio alarm recipient
When a certain SMS is received, the app displays a 3-button image. Behind these buttons are various actions, which can be answered to the SMS via SMS or call.
Important!
Huawei: The app requires you to choose as a protected application to work in the background. Make sure the app isn't blocked by antivirus programs
(https://www.g-rega-sp.si/SMSPozivnikHuawei.aspx)
Samsung S8 and similar: Select Apps> Settings, Device Maintenance, Battery, Unmonitored Apps-Add App to Unmonitored Apps (https://www.g-rega-sp.si/SMSpozivnikSamsung.aspx)