What is SMS? SMS which stands for Short Message Service.It is used to the send short text messages from one cellular phone to another. Standard SMS have a limit of 160 characters per message. Updated on July 2, 2019 Was this article helpful? Yes No Related Articles How to check SMS delivery report? How to check SMS account balance ? I don’t want to renew my account, then what should I do? If I not renew account within 30 days then what happen? Additional Sender id Setup Process How Can I send Custom SMS ?