I bought this watch on groupon in UK. This watch runs about 5 to 7 minutes quicker per day. I did not use it or demage it before. I do not know the reason why this happened. I hope you can change a new one without any problem. And the address above is available to 28th of July,2013 because I will move out after that date. So please delivery the watch back as soon as possible. Thank very very very much!