Below are the 'fully amateur' hardware patch photos:

You can make it at your OWN RISK, please do not SHORT CIRCUIT the wires each other!

OK this is not the 'perfect' cable, just works!

----> New smaller patch using schottky diode and 2 capacitors:

Other cable patches
I prefer the PCB one because I have a 5 meters extention cable driving the 3G modem outside the building, having a perfect 5 bars of HSPA signal and no radiation for me!