By Marsha, 3 October, 2015 Forum iOS and iPadOS Is it safe to update to the latest iOS 9X version? Considering purchasing an Apple Watch and I have read posts that you must have the latest iOS version in order to update the watch from it's first version to 2.0 Options Log in or register to post comments Comments Forgot to add I have an iPhone 5S, running version 8.4, and I use voice over Choice It's really up to you. Yes, you do need to have IOS 9 to upgrade the watch to OS 2.0. However, I have an Apple Watch already, but I'm holding off on both IOS 9 and WOS 2.0, because of all the bugs in IOS 9. But it's really up to you as to whether they're significant enough to put you off. Check out the posts here that report the bugs and decide whether you feel you can live with them or not. Updated my 5S I updated my 5S to 9.02 and so far have not encountered anything big. One thing I did find is when I send an audio message I am told they cannot hear me.g I updated my 5S2 9.02 and so far have not encountered anything big. One thing I did Fryant it is when I send an audio message I am told they cannot hear me.