What is SMS? SMS, which stands for short message service, is a form of text messaging that allows a message to travel across mobile phones using cellular networks almost instantly.

Today, SMS messaging is not as precious anymore — thank you, unlimited text messaging plans! — and although it's also been somewhat cast by the wayside in lieu of more efficient app ...

RCS stands for rich communication services. RCS messaging is a communication protocol developed by the GSM Association (GSMA) that's been around since 2007 and was intended to replace SMS and MMS ...