Hi family, my iPhone 5s is currently in iOS 8.4.1. The iOS update to iOS 9 was available a few days ago, but I have not decided whether to upgrade or not, at the last time I went to iOS 8 from iOS 7, my iPhone slowed down.
I see people think that iOS 9 has many new features as well as but there are some bugs when upgrading from iOS 8 to 9. Usually only those who use an iPhone 6 or later upgrade
So can anyone advise me? Should