1. AC Question's Avatar
    When I turn on my phone the screen shows "Android is upgrading, optimizing application 1 of 1." This screen message has been on for hours. I cannot use the phone and I can't turn it off. I have to remove the battery to turn it off.

    What can I do to either complete the upgrade so I can use the phone again?

    Thank you,
    03-30-2015 10:46 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Did the phone actually get a system update? This would be surprising, considering that the phone is somewhat dated (unless it was a Samsung update).

    Try forcing a power off by pressing and holding the Power button for about 15-20 seconds. Then pull the battery, wait 10 seconds, put it back in, and power back on again. Do you get the same thing?
    03-30-2015 11:54 PM
  3. Mandy Gagne's Avatar
    I am having the same problem with my centura. I held the power button to shut it then took out the battery and when i turned it on it resumed with android is upgrading. How do I get it to stop so I can use my phone?
    04-04-2015 11:22 AM
  4. pharmacy814's Avatar
    I am having the same problem. I have tried turning my phone off and taking out the battery but when I turn it back on I keep getting the "Android is upgrading... Optimizing application 1 of 1" message. I have also tried pressing the Power off button, volume down and home buttons at the same time and I get the message "Warning!! A custom OS can cause critical problems in phone and installed applications. If you want to download a custom OS, press the volume up key. Otherwise, press the volume down key to cancel."
    What do I do from there or should I not do anything?
    04-06-2015 09:32 AM
  5. rbolko's Avatar
    i am having the same problem with my phone for 2 days now... i did the same thing to reboot {hold volume button and power button] and then pushed the volume down button and am now at a screen with an android and the msg "Downloading... Do not tun off target!!" When i did this yesterday this screen never went away so i am doing it again... any suggestions?
    04-07-2015 09:09 AM

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