MWI - Messages Waiting Indication

This indicates that there are one or more messages waiting to be delivered to the mobile due to previous unsuccessful delivery attempt(s ). The MWI is stored in the HLR (Home Location Register) and VLR (Visitor Location Register) with which an MS (Mobile Station) is associated.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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