Choose Module GSM IoT

Hello, I am currently on a connected object project. And my project object need to communicate notifications to a mobile approximately 100 messages per month.
I don't know which GSM module i need to choice ?
I was thinking module 3G / LTE-M with LPWAN to reduce the consommation and avoid the obsolescence later the end of 3G.
Thank you

Arduino SIM, the new cellular connectivity service for the Arduino IoT Cloud | Arduino Blog is one option