Geeetech

ok thank you for your willingness, vendor has already contacted and agreeing as to the items, one more time thank you very much

I measured all soldered connections simconector to sim900 and everything is soldered well, the picture shows the measured values certifying that the connector and soldered connections are ok, there remains the error in SIM900,

I already wrote at the beginning, that I try also another simcard (Orange Tcom-O2-) and not one card does not work, the device is nonfunctional

I did measure directly the SIM900 pin30-33 and I measured the same values, Therefore, I measured the resistance test between sim900 pin30 and cardconnector pin4 0,23ohm and tests show it's soldered to the well, sim900 pin33 and cardconnector pin5 21,8ohm

almost the same values ​​as I measured straight pins on SIM900

1 179K
2 0
3 0
4 0
5 0
6 9,998M

I have this multimeter

I did not know if I measure the resistance or diot,

resistance
pin30 0
pin31 182,33K
pin32 10,31M
pin33 0


diot
pin30 .0L
pin31 1,2180
pin32 1,3216
pin33 .0L

You did not write exact measurement procedure, whether it should be GPRS enabled in power or off, where do I put the black and red cable multimeter, etc.

sim card I'm trying to change for just other when it did not work, I have no home no high magnetic field nor high voltage, if that were nothing to me at home did not work, no device would not work :) remains a problem only in contacts, please describe to me what I measured with a multimeter, sim car...

ok so here is a listing of what you sent commands, from power on GPRS: ˙˙˙˙ RDY +CPIN: NOT INSERTED +CFUN: 1 AT+CSQ +CSQ: 17,0 OK AT+COPS=? +COPS: (1,"O2 - SK","O2 - SK","23106"),(1,"Orange AT","Orange A","23205"),(2,"Orange SK","Orange","23101"),(1,"T-Mobile SK","TMO SK","23102"),(1,"A1","A1","2320...

hello,
works also HWserial and SWserial, power key works, I know them on and off red status LED, something must be communication between sim and SIM900