Got a deal with mobile types Three? Love hopping online with their stack of killer web deals and free Skype access? Course you do. But there’s a sting in the tail to being a thrifty 3G snob – Three’s network won’t let you browse the web, or make VoIP calls unless you’re within the realms of its 3G footprint. Other networks might let you chug along on reliable old GPRS, but not Three, and it’s worth taking note of why that is before splashing out on a new SIM. Read on and we’ll tell you all the details.