Slow phone after iOS4 upgrade? Try this...

Question

I upgraded my iPhone 3G recently to iOS4, and experienced the general slowdown that others have reported. I also had problems with photos not displaying correctly. I deleted and reimported the photos, and that solved that problem, but the slowness and "lag" was still there.
I came across this tip in the misc.phone.mobile.iphone newsgroup:
quote
My 3G was quite slow when I first upgraded to iOS4. But I followed some
advice on the Apple Support Forum. A combination of Settings -> General ->
Reset -> Reset All Settings, followed by a full shut down and restart did
wonders to improve the operation.
unquote
I haven't seen the source for this tip before so I wanted to pass it on.
Doing the reset as described above doesn't lose data, just some settings (Home screen, WiFi login key, 4 digit lock code etc.), but it has got rid of the lag when switching the phone on, and restored some of the pre-upgrade speed.
Hope this helps.
Cheers

Answer 1

Well, first you say that your phone is slow.  Then you state that your phone told you to remove unused apps.  Did you read my last post?  From what I've read, most phone performance issues are app related.  You either have too many apps running at once (most likely), have a third party app that is causing a problem (less likely), or there is something actually wrong with your phone (least likely).  As I stated, I noticed that my phone was slower than normal after installing OS6.  I was using OS6 just like OS5, but the difference is that the apps in OS6 seem to want to close differently.  So I had like 8 apps open at once, and that was my problem.
The first statement that you make is so vague that no one is going to be able to help you.  When is your phone slow?  What apps are you running during this time?  Do you have excessive apps open?  Is it slow all of the time or just sometimes?  What non BB apps (third party) are you running?  The 9300 also only has 256meg of ram, so that is going to make your application behavior that much more noticeable.
Try holding the ALT key down while pressing the BACK button (the one just to the right of the track pad) and that will show you which applications are running. You should see a minimum of 5 (home, phone, browser, messages, and messenger). If you see more than this, particularly if there apps open that you aren't using, this is likely a big contributor.  Close those apps and see the difference.  Just for fun, do a battery pull.
The second statement that you made is even more confusing because at no point in time would your phone ever tell you to uninstall something.  At least, not that I can think of.  What do you mean when you say the phone asked you to remove unused apps?