An ITU-T (International Telecommunications Union – Telecommunications Standardization Sector) numbering plan standard, make up of the MCC (Mobile Country Code), MNC (Mobile Network Code) and MSIN (Mobile Station Identification Number). The IMSI (International Mobile Subscriber Number) number of a mobile is an E212 number.


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

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