nitrotech: Don't do it - it's OK on the ipad 2 but painfully slow on the iPhone 4 - suggest you find someone who's already upgraded and check out the performance before upgrading.

clicknz:

nitrotech: Don't do it - it's OK on the ipad 2 but painfully slow on the iPhone 4 - suggest you find someone who's already upgraded and check out the performance before upgrading.

err... you mean that you have found it slow. I don't know percentages, but I would suggest that 'most' iphone 4 owners are finding iOS 7 just fine (I haven't seen the lines of pitchfork waving iPhone 4 owners around here).

There could be an initial slowness due to spotlight re-indexing items on the phone, or there could be settings on by default that are hogging resources that could be turned off, a restart or a forced reboot (hold sleep/wake button and home button - keep holding until Apple symbol shows) might help put things back in order, a restore may help the situation or as a last resort you could erase the phone, restore and set up as a new device and then manually add back all your content.

The last option is time consuming but a lot of people recommend doing this for any major update. No, you shouldn't have to, but there could be a couple of years worth of dodgy bits and pieces from app crashes, etc that get caught under the carpet... good time for a Spring clean. I'd bet you a fancy custard-filled cronut that you'll find iOS 7 slicker on a 4 than iOS 6 was.