Method for using non-standard-format user identity module card

Abstract

The method includes steps: first, determining system capture type of optimal roam list not in standard format written in user ID module card; then, determining whether the system capture type is corresponding to frequency range of terminal; if yes, then using the card according to user ID module card in standard format; otherwise, after optimal roam list not in standard format is determined ad legal, frequency point parsing is carried out according to parsing formation corresponding to frequency range of terminal. The invention makes CDMA terminal compatible to user ID module card in not standard optimal roam format.

Description

technical field [0001] The invention relates to a method for using a subscriber identification module card, in particular to a method for using a non-standard format subscriber identification module card. Background technique [0002] The manufacturer of the UIM (User Identity Model) card will write the PRL (Preferred Roaming List, preferred roaming list) into the UIM card according to the requirements of the operator. The PRL is stored in the CDMA (Code Division Multiple Access, code division Multi-address) The list of preferred frequency points when the mobile phone searches the Internet. According to the description of the agreement, after the mobile phone is turned on, it will search according to the frequency points in the PRL. The purpose is to make the terminal search system faster. [0003] According to the description of the "Removable User Identity Module (R-UIM) for TIA / EIASpread Spectrum Standards (TIA / EIA / IS-820)" standard protocol, PRL defines six types of syst...

AI Technical Summary

Problems solved by technology

[0011] For 800M terminals, if the system capture type in the non-standard PRL is the fifth or sixth system capture type, it will cause the terminal to fail to read data, so that it cannot be registered and used; the same for 450M or 1.9G terminals Speaking, if the system capture type in the non-standard PRL is the 1st, 2nd, 3rd or 4th system capture type, it will also make it unusable

[0012] At present, the situation in some countries and regions is mainly: in 450M and 1.9G terminals, the system capture type of the PRL of the non-standard UIM card is written as Cellular CDMA (Standard Channels) or Cellular CDMA (Custom Channels); In the terminal, the system capture type of the PRL of the non-standard UIM card is written as PCS CDMA (Using Blocks) or PCS CDMA (Using Channels); according to the above, these situations will cause the CDMA terminal machine to be unable to read the card data, and thus cannot work normally. use

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