HTC one m8-I get notified of a system update available,but when I try to download I get an error message that says it appears Iam running a modified version of the software and they can not download update.I’ve checked software and it’s official. HTC tells me it’s because my phone is a global issue phone.HTC has not been very helpful.Could this be my problem,and is there anything I can do? Thanks for your help …..