What is the Difference Between SMS and IM (Instant Messaging)?

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The main difference between SMS (Short Message Service) and Instant Messaging (IM) lies in the technology and infrastructure they use to send and receive text messages. Here are the key differences between the two:

  1. Network: Instant messaging requires an internet connection to function, while texting (SMS) uses the cellular network for communication.
  2. Software: SMS is accessed through built-in mobile apps, while instant messaging relies on third-party applications like Whatsapp, Messenger, or Slack.
  3. Always connected: Instant messaging typically remains connected until one of the parties ends the session, whereas text messages are usually transmitted and finished even if the recipient responds.
  4. Character limit: Text messages are typically limited to 160 characters, while instant messages can be longer.
  5. Multimedia support: Instant messaging supports multimedia like pictures, videos, and voice recordings, while SMS has limited multimedia capabilities.

In summary, texting is more focused on sending short messages through the SMS protocol, while instant messaging offers more features and functionality by utilizing internet connectivity and supporting a wider range of multimedia content.

Comparative Table: SMS vs IM (Instant Messaging)

Feature SMS (Short Message Service) IM (Instant Messaging)
Definition SMS is a text-based communication service component of most telephone, internet, and mobile-device systems. IM is a type of online chat that offers real-time communication between two or more people.
Speed SMS messages are typically delivered in seconds, but may take longer depending on the network. IM messages are usually sent and received instantly.
Reliability SMS messages are more reliable as they are stored and forwarded by the network, ensuring delivery even if the recipient is not available. IM messages may not be delivered if the recipient is offline or the connection is lost.
Cost SMS messages usually incur a cost, which varies depending on the provider and plan. IM messages are generally free or cost less than SMS,especially for international communication.
Length SMS messages have a limited character count, usually around 160 characters. IM messages can be longer and may not have a character limit.
Rich Media SMS does not support rich media, such as images, videos, or emojis. IM supports rich media, including images, videos, emojis, and other multimedia content.
Persistence SMS messages are typically deleted after a certain period, and users may need to save important messages manually. IM conversations are often saved and stored, allowing users to access their chat history.
Group Chat SMS supports broadcast messages to multiple recipients but does not support group chat threads. IM supports group chat threads and allows users to communicate with multiple people simultaneously.