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hello friends,
I'm using sim900a module and worked for 4-5 weeks correctly after that module shows sim not inserted and simvdd will be 0v. i have designed 5 modules 4 modules are working but 1 module has this problem. plz any one help me...
my design is as per the datasheet.
regards...
hello,
i also getting same problem, when i keep my gsm module out side my office(to open air),then i will get the network and i can send sms and make a call but when i keep it in office then after 5-6 min network will be lost......as same as above problem..... if u hav any solution plz...
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