1. soidog2's Avatar
    I have two 3GS phones unlocked & operating with 3.12 fw.
    Very fast, running smoothly.

    I was thinking of upgrading to 4.01 but read some reports of slowness with 4.0 installed.

    It would be interesting to see some reports from people with 3GS phones running firmware 4.0/4.01.

    Did the upgrade slow down your phone ?

    Thank you!
    2010-07-26 08:45 AM
  2. Will01's Avatar
    The upgrade slowed mine down, but not drastically (the 3G is unbearable but the 3GS is fine), the main reason for going back to 3.1.3 was for some of my JB apps which I could not live without on iOS4. Resupported, infinidock autolocktoggle and insomniatoggle to name a few.
    2010-07-26 03:30 PM
  3. kaepora's Avatar
    I have to say I found that launching apps quicker on iOS 4.0! There was a slight slow down at times but I didn't notice much difference between 4.0 and 3.1.3....except battery life...omg, my battery drained so quick on 4.0!
    2010-07-26 03:52 PM
  4. iNeo's Avatar
    my iphone 3gs on 4.0 is fine, the camera app is amazingly quick, my battery is fine, have to say it works just well, even my sisters iphone 3gs runs well on 4.0 and she never closes the apps in her multitasking tray, every time i open it, its got pages of apps, but still it runs smoothly.
    2010-07-26 04:00 PM
  5. soidog2's Avatar
    thanks to all that answered !
    2010-07-27 03:55 AM