As music festivals and other summer events get into full swing, here’s a list of essential items that you need to take with you. A low-cost smartphone Why run the risk of losing your iPhone or other expensive smart phone in a field in Hampshire or some other festival location, when you can get a smartphone for incredible value from 7dayshop.com? The excess on any mobile phone insurance you might have could be higher than the price of a Tecmobile Opal 2 Dual…