Method for automatically adjusting effective communication distance of radio frequency sim card through short message

Abstract

A method for automatically adjusting the effective communication distance of the radio frequency SIM card by short message, includes: establishing a mobile communication terminal radio frequency parameter database based on the mobile communication network server, under control of the central process unit CPU in the said radio frequency SIM card, reading out the IMEI code of the mobile communication terminal and determining its type; searching the corresponding radio parameter of mobile communication terminal in the database by short message, and applying it; if the corresponding radio frequency parameter of the mobile communication terminal can not be found in the database, prompting the user to correct the radio frequency parameter. In this way, though the mobile communication terminal device is changed, the radio frequency parameter of the radio frequency SIM card can be updated automatically.

Description

technical field [0001] The present invention relates to a radio frequency signal strength control method of a SIM card built in a mobile communication terminal and having a radio frequency transceiver interface, in particular to controlling the radio frequency signal strength according to the structure type of each mobile communication terminal, so that the radio frequency of each terminal The effective communication distance is about the same method. Background technique [0002] A Subscriber Identity Model of an existing mobile communication system, referred to as a SIM card, is widely used as a subscriber identification device of a mobile communication terminal. With the development of science and technology, various intelligent circuit modules are added in the SIM card body of ordinary mobile communication terminals through various methods, so that the SIM card through the transformation has other functions closer to the SIM card than the basic SIM card functions. The f...

AI Technical Summary

Problems solved by technology

For a radio frequency SIM card with radio frequency transceiver power set, if the radio frequency SIM card is installed in a mobile communication terminal with poor shielding effect, the effective communication distance of radio frequency will be relatively far, and some can even reach about 1 meter, which is easy to cause misreading If the radio frequency SIM card is installed in a mobile communication terminal with a good shielding effect, the effective communication distance of the radio frequency is very close, and some even cannot send and receive radio frequency signals at all, resulting in the phenomenon of not reading the card

In order to avoid the above disadvantages, before using the radio frequency SIM card or when changing the mobile communication terminal, the user must go to the service network to re-calibrate the radio frequency transceiver power of the radio frequency SIM card, that is, to effectively communicate with the radio frequency of the mobile communication terminal installed with the radio frequency SIM card. Distance re-calibration, the proofreading process is more complicated, causing great inconvenience to users

Images