What is SMS and how does it work? - Android Authority
https://www.androidauthority.com/what-is-sms-280988/
WebAug 14, 2023 · SMS, or Short Message Service, is the protocol cellular phones use to send and receive text messages over a 2G, 3G, 4G, or 5G network. Unlike app-based messaging services, you don't need a data...
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