I have 5 x 5s and 10.2 so far has trashed the battery life , 4 of my iPhones have unresponsive screens at times, opening apps , wrong screen, reversed touch, go right but screen goes left , have reset a few times, in the end twice clean installing in dfu mode, for now the one I'm using appears ok apart from the battery lasts a couple of hours only, the rest I'm leaving boxed waiting for an update, I repair to sell , unable sell yet due to unstable... ios 10 must add , on updating a perfectly working 5s 64 gb simply died ! Unable sort it. Apple your products are gd however killing a phone through an update controlled by itunes / Apple, you really ought repair or replace, not say tough it's out of warranty and therefore my loss... unlike you Apple... i earn pennies not billions! For those with problems still I suggest using dfu mode... search it, it's not the standard reset