Terminology » Mobile Communication » IM vs SMS: Understanding the Key Differences

IM vs SMS: Understanding the Key Differences

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This page compares IM vs SMS and highlights the key differences between them. Both are common methods used to exchange or transmit messages between devices.

IM vs SMS: A Comparison

Here’s a breakdown of the differences between Instant Messaging (IM) and Short Messaging Service (SMS):

SpecificationsIM (Instant Messaging)SMS (Short Messaging Service)
Full formInstant MessagingShort Messaging Service
Application of useUsed in personal desktop computers for instant message transfer.Primarily used in mobile phones and tablets to transmit short messages.
BackboneUtilizes internet infrastructure.Relies on telecom towers to provide the service.
Limit on charactersNo character limit.Has a character limit per message (typically 160 characters for standard SMS).
ChargesGenerally free, requires an internet connection.Charged as per the telecom company’s charging rules.
CoverageNo geographical limitations, can be used globally.Often limited to the country where the mobile is registered for telecom service. International SMS is possible but usually charged at a higher rate.