IDD - International Direct Dial

International Direct Dial is an international number which can be dialled directly by the user. As such, it will include the international prefix for the country e.g. +44 (United Kingdom), +1 (United States of America), +33 (France), +91 (India), +86 (China) etc.


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

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