SIM cards store multiple phone numbers of same person?

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me@privacy.net - 22 Mar 2007 19:15 GMT

have my 1st ever gsm based cell phone

I'm confused abt how the phone stores the phone numbers
in the sim card

If you have multiple numbers for same person.....does
it store it as multiple entries?

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John Henderson - 22 Mar 2007 21:49 GMT

> have my 1st ever gsm based cell phone
>
[quoted text clipped - 3 lines]
> If you have multiple numbers for same person.....does
> it store it as multiple entries?

Yes. SIM phonebooks are fixed linear "elementary files", so
even completely duplicated entries are perfectly legitimate
unless the phone's firmware itself tries to stop this
happening.

EF_ADN (abbreviated dialling numbers) is the SIM's general
phonebook. But there are others, such as EF_MSISDN (own
numbers), EF_LND (last number dialled), and so on.

The number of entries in each of these SIM phonebooks depends
entirely on the SIM.

See GSM 11.11 for details on the SIM files and their structures
and access methods.

John

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