GSM SIM Cards Circuits

[pejman]

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.

Bye.

[Anonymous]

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

[Anonymous]

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?