O2 customers can get a little something extra from this week, courtesy of O2 Priority Moments for iPhone and Android phones.The idea is both simple and quite impressive. Download the app (if you are an O2 mobile customer), refresh it and via your phones GPS, offers will come winging in for your immediate vicinity. So, if you happen to be walking past a Yo! Sushi, you might be offered some free miso soup with your meal, or if you are walking past a Toni & Guy salon on the right day, you could get a discounted hair cut or styling. You might even get a VIP entry into something just for being with O2.Tap the offer you want on the phone's screen, request a code by selecting 'yes please', then present it at the appicable establishment. If you move location (you might drive over to a different town), just hit the refresh button and more offers will appear, with a map to those retailers offering the deals.The app is free to download, but don't forget, it is only for O2 customers. You'll have to enter your phone number to authorise the app, after which you'll be sent a code to use it. If you aren't on O2 (or it isn't your phone number), you can forget it. For O2 customers, it seems like a no-brainer download.