Hi,
I got the module from spark fun and worked great. I'v built a PCB for it to make it smaller and it also worked great. the problem is the yesterday i connected a wire that is not related to the module and for some reason now the module can't identify the sim card.
the same module and sim card work great on the shield. So its a problem with the PCB..
Any help would be greatly appreciated.
here is my scheme:
