I had doubts about whether the 6-Euro-product can actually be genuine, and have these then ordered this in the hope that I have at least one functioning then. The star trigger there because he was discharged upon receipt so that the mobile phone has been about 1 minute no response. I have removed and reinstalled 3 times and have already prepared the return when he has sometime but shrugged. To my knowledge, this is not conducive to the battery life. It was not extremely cold, as it was delivered; because it can not be so also. Now he invites decent at least for 4 weeks, so he seems to have coped with it for now.