13 
Dammit, it’s hard to get a decent mobile data connection sometimes. Are the walls thick in your building? Are you surrounded by exotic electrical equipment that’s causing interference? Or did you just stumble into a cage fight by accident?
Clearly the organiser doesn’t want you Googling tactics during the fight, anyway. Maybe just throw the phone at your opponent—it’s no use otherwise. [XKCD]
Did you just pay for expensive foil lined insulation for your property? Whoops.
My home office is lined with foam sandwiched with foil on all walls, ceiling and under the floor but oddly I get better signal than when I am in my house which has practically zero insulation of any kind.
you either did something right or something wrong, most of the ones I go in, signal drops right down.
No Alt Text.. Bah