You're right - its just too unpredictable. The bit that gets me is the hardware in laptops / devices. Apple seem to take some care in antenna design etc, and ap

You're right - its just too unpredictable. The bit that gets me is the hardware in laptops / devices. Apple seem to take some care in antenna design etc, and appear to be fairly fast / reliable, but many device manufacturers stick in whatever, if you get a link then great, call it a day.