GSM SIM Cards Circuits

Started by pejman, Jul 26, 2005, 10:30

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Hi All,

Does anybody know how to make a Dual SIM Card Circuit?
Maybe this can be done with a BUS redirector circuit using an IC.
Thank you in advance for your help.



it is very simple to make gsm dual sim jaket for mobile only IO pin do seprat with the switch for eximple IO pin of mobile conect through switch of sim1 & sim2 other all pin conect parallel so ur mobile read to number with out restrating only one switch side of mobile
for detale messging 00923455209761 by DasNesDace


Thank you for your help.

what kind of ICs can we use to switch between two sim cards?
what is the programming requirements and how can this be done?