Bulk SMS or Text Message Marketing, is a form of text messaging service that allows a business to send a large number of SMS to various mobile phones through different mobile networks. Bulk Messaging allows you to send a message to a larger number of recipients at once. That is why it has become one of the massively used tools in the digital marketing industry.

SIM based messaging service is a process of sending promotional messages to an audience without a Sender ID. SIM based SMS is a messaging service that DLT complications put into use. These messages can only be delivered to Non-DND numbers. SIM based bulk SMS services do not require any template registration or Sender-ID registration, thus it saves the inconvenience of new DLT norms. It is one of the easiest ways to connect with your audience by putting in a lesser amount of labour.

TRAI (Telecom Regulatory Authority of India) has recently come up with a specific term called, Transactional SMS. Transactional SMS service is typically used by banks. These messages are used to deliver ATM details, bank balance, and other transactional information. Transactional SMS is compatible with DND numbers, meaning, you can send messages to your target audience without any problem.