i used to do every update on my ipad2 but after one I think it was ios8 it made my iPad lose everything and all that was on screen was the charger pic. Couldn't do anything with it and had to download iTunes off my laptop onto it for it to work again. I heard that Apple charge something like £100 to fix this problem which is disgusting as it was their update that caused it to happen. Well from then on I have avoided updates to avoid this happening again. I now have iPhone 6s and was wondering if it's worth doing any updates as I've read some have caused phones to not work properly. I have never noticed any difference on iPad when updating it so is there any need. Also I was thinking if an update would cause problems on one say iPhone would it cause problems on iPad as well. As I am thinking of doing update on iPad to see if it works then if it does do it on iPhone.