08-10-2014 14:55 - edited 08-10-2014 14:56
Your questions are answered in this quick video ;-
It's only basic although it gives you a good idea of what they do anyways after speaking to them it's best to avoid using Sim Boxes as you'll get questioned to heck what you're using it for etc...
So my advice don't even use one.
on 08-10-2014 15:02
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 08-10-2014 16:00