See the Concept map here

See Supporting files here

SMS

• SMS  = Short Message Service
• Is available for all phones on a cellular network
• Can be used at any time on the cellular network
  • Fees are usually encompassed in the user’s mobile plan

Main Advantages

• SMS is only dependent on the mobile network connection, and essentially can reliably work at any time (it does not rely on internet connectivity)

Main Disadvantages

• Can only send text

IM

• IM=Instant Messaging
• Is available only where…..
  • The user installs the service
  • some phone manufacturers have  a service pre installed
  • Provided by 3rd party apps or Companies
    • Iphone’s Imessages
    • Whatsapp
    • Telegram
    • Facebook Messenger

Main advantages

• Can be used to send a variety of data formats in addition to text
  • Files
  • Images
  • Documents
• Easily supports Mobile to pc messaging
  
  

Main Disadvantages

• Messages are not always guaranteed to be instant due to   breaks in internet connectivity, which is common for internet provided by dataplans
• All IM services require  an internet connection and/or a dataplan to be used.
  
  
  

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