I live right on the edge of mobile reception. I just get a signal with an external antenna, but it is weak. I am thinking of getting a small indoors GSM booster, like this.
I was wondering if it might be possible to connect the booster out-aerial socket directly to the external aerial socket on my phone, instead of using the phone's internal aerial, as is intended with these devices. I think that it might reduce other local radio noise that the phone picks up, and provide a stronger link. But I'm not sure if it's safe to do so (wrong impedance or something?). If that's the case, would there be a safe way to directly connect the devices, with some kind of coupler? Is it going to provide any benefit over just having the GSM booster set up normally?