iOS very slow since update to 4.2.1

Have you noticed your iPhone has become really slow with the last iOS update?  I’m talking about iPhone 4, the most powerful model available 😉

Telltale signs:

  • Camera app takes at least 10 seconds to open
  • double click for multi-tasking takes 2 or more seconds to open task bar
  • clicking Home button to close apps takes 2 or more seconds
  • animations when you open phone are jerky
  • don’t even try typing something in Spotlight

It got bad to the point I started searching around the Apple forums, but unfortunately there’s a lot of misinformation on the relevant topic, and too many hysterical posters.

The kind of advice that’s being given out is generally along the lines of:

  • do a factory reset on your phone (!)
  • delete all your apps
  • delete your mobile me account
  • increase screen brightness (wft??)

Bleh.

Once I installed the System Info app and found I had only 6MB RAM free, it was easy to fix the problem.

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