Until the update rolls out, some users say they’ve been able to get rid of the problem by turning their phone off and back on.
Animation flu
Some folks say they’re already sick of iOS 7. Literally.
iOS 7 users can go to “Settings,” then “General” and then “Accessibility.” Click on “Reduce Motion” to make the zooming go away.
Battery drain
Simply, they say iOS 7 seems to drain their batteries faster than iOS 6 did.
Again, go to “Settings” and “General,” but then choose “Background App Refresh.” From there, you can choose which apps you’ll allow to run in the background and which you won’t.
Certain apps log you out
If you’re having problems, you can go to “Settings,” “General” and “Background App Refresh” again. Turn off any apps you’re having problems with.
Source: CNN