After an update I seem to spend an inordinate amount of time disabling services on our two 5S iPhones. We use the same Apple ID and so after the update, at home, both our phones ring with the same incoming call...... Answer, after trawling the pages of the internet, is to disable 'iPhone Mobile Calls' in FaceTime for God's sake !!!! How the Hell am I supposed to work that one out ? Apparently our home wifi was being used to send out these calls. Great idea Apple -NOT. The same with iMessage which, under normal circumstances, happily duplicates messages randomly. Answer, disable it and use SMS only. No problem here in the UK as virtually all SMS services are unlimited anyway on most plans. I sometimes wonder why I bother updating at all, it seems to take several days to get our phones doing what they did quite happily before the update. I suppose there are those who actually understand the 'extras' that come with the updates but mere mortals such as us, who use our phones for phoning, texting and a bit of browsing and not much else, end up mightily frustrated.