I purchased a 3G dongle from an unknown manufacturer (ZD Incorporated), and I am trying to boost its signal with a 3G antenna. I'm on the assumption that the manufacturer did not put an antenna there, but it's possible to solder one, because I've seen exactly the same model but with an external connector (more expensive). The only known information is that uses a Qualcomm chip.
Here is the antenna:
I have bought an UFL connector in order to solder to the PCB, but I do not find the standard placement (2 ground connectors and 1 signal), so I cannot really decide where to solder it.
Any suggestion or experience with this devices? Is this even possible?
Edited (@PeterJ): Here it is a zoomed image: