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• Patchset:

  • Patch Set #1:

    why would 18 digits be permitted? According to the wikpedia "SIM card" page, *In practice, this means that on GSM cards there are 20-digit (19+1) and 19-digit (18+1) ICCIDs in use*.

    E.118 actually doesn't really specify a minimum length. It just states that the IIN at the beginning is variable-length (max 7 digits) and there are a variable number of account identification numbers following it up to the max. length of 19 digits. GSM Phase 1 violated that max-19 by using 20 digits.

    So I think we should either keep it 19-or-20 digits [practical] or allow anything up to 20 digits [narrow reading of E.118 plus phase1 compat].

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