I'm having troubles making my aftermarket 3G module work. I bought a Huawei EM820, but I can't get it to work in either Win 7 or Win 8.
For those using Mobile Partner, I just get no signal on the application.
So I decided to check the serial line for possible problems with the module. Here's the output:
When CFUN == 0, that means: "Low Power Consumption Mode"
And RFSWITCH has 2 return codes, which are: software state, hardware state
So it seems that even though the software toggle is on, the hardware toggle isn't.
That toggle is switched by the Winpad motherboard, on the W_DISABLE# pin.
I've tried using OEASY on both Windows 7 and Windows 8, and in neither of them I see an option to toggle the 3G radio.
I'm not entirely sure how, but I did somehow manage to toggle it once by doing something, because I got a RFSWITCH reply of 1,1.
It was right after installing OEASY on Windows 8, but I had the tablet disassembled, and when I closed it up, I wasn't able to switch it back on again.
Also on Win 8, I see my wireless listing the wireless network around me, but right above it I see: "Mobile broadband 2 (Off)"
Does anyone know how to switch the 3G hardware toggle to on???
I'm starting to consider soldering a jump wire directly to the PCI-EX wire to maintain that toggle ON!
So I found out the pin that I have to change to make it always on. According to a user in another forum:
For mini pci express, it is pin #20, which is responsible for the same function (also active low). It is located on the underside of the board, second pin from the notch toward the side with more pins.
For a picture regarding the pins:
( I can't post external links, so just join the text above)
I'm gonna wait some more for a better solution, and if nothing comes up, I'll just add tape to that pin!