jim kelly martial arts Quad band phones, or international phones because they are sometimes called, use four bands and will be used from any location. If you are looking to start out a mobile phone business and you wonder what exactly is an unlocked phone bound to sell well and provide the very least challenge with customers it is going to likely to end up this type of cellphone. Another thing will be the urgency that phones bring to our lives. For example. If I have a message while driving. I have this gravitational pull towards my phone then in no time, there it can be again, in my hand. The PHONE.I mean what's so interesting on the phone that we are prepared to put our lives and others at danger, just to browse the next Whatsapp or Facebook message. It can wait till later surely.