If you run a small business, EE has launched something that could make your life a whole lot easier and more profitable. It's called iZettle.iZettle is a mini chip-card reader for smartphones, effectively turning your mobile into a mobile payment terminal. Just think, you can have a stall at a car boot and take payments from cards - something other sellers are unlikely to offer. But more significantly, if you sell as a small business in the wider sense or offer a trade, iZettle is an affordable and portable way of taking plastic.Good to go with either iOS or Android phones (once you have downloaded the free app), the £20 device can accept payments from Visa, MasterCard, American Express and Diners Club cards, with a charge of 2.75% going to iZettle. That is, presumably, how the company can afford to sell the device so cheaply, as all those fees will soon add up.'The beauty of iZettle is that it's simple to use, totally secure and takes seconds for a transaction,' said Jacob de Geer, CEO and co-founder of iZettle, 'Whether you are a cabbie, florist, tradesperson or a courier, iZettle gives you the flexibility to operate in both cash and cards. The possibilities are endless because hundreds of thousands of small business can now take plastic. We are very excited about our full commercial launch in the UK and the positive results of our Beta test with 4,000 users over the past six months.'If you think you can boost your bank balance by taking plastic, head over to an EE store, which has the readers instore from today.