locked out - Forgot login pattern on my tablet

  • user34728

    This question already has an answer here:

  • Answers
  • Voornaam Achternaam

    Suppose your tablet is in WiFi or in airplane mode? And you can't unlock it without? There's a way to solve this:

    Open CMD:

    Change directory to the android SDK platform tools (for example C:\Program Files\Android\android-sdk\platform-tools)

    Type following commands in CMD:

    • adb devices (verify device is identified by pc. If not reconnect device and try again. it should display “device” with a serial no)
    • adb shell
    • cd /data/data/com.android.providers.settings/databases
    • sqlite3 settings.db
    • update system set value=0 where name='lock_pattern_autolock';
    • update secure set value=0 where name='lock_pattern_autolock'; (for some devices update “system” is enough but I had to update “secure” too)
    • update system set value=0 where name='lockscreen.lockedoutpermanently';
    • update secure set value=0 where name='lockscreen.lockedoutpermanently';
    • .quit
    • exit
    • adb reboot

    Now your device should be unlocked. If not do this step too:

    • adb shell rm /data/system/gesture.key

  • Related Question

    locked out - Recovering from forgotten lock pattern
  • Melissa Bray

    My son has an impression tablet 10 and has forgot the lock pattern. How can we reset it without knowing the code?

  • Related Answers
  • Lie Ryan

    If you entered your pattern incorrectly 5 times, Android would lock the lock screen so you cannot draw any more pattern for 30 second (this is to prevent brute forcing) and a button will show up that will allow you to reset the pattern by entering your Google Account email and password.

    The image on the left is what the lock screen normally looks, after entering the pattern incorrectly 5 times, another button appear on the bottom.

    enter image description here enter image description here

  • Gilles

    You may be able to figure out the lock pattern by looking at the phone screen in the right light, or taking a picture and perhaps performing simple contrast adjustments on the picture. See “Smudge Attacks on Smartphone Touch Screens” by Aviv et al (presented at WOOT 2010).

  • Matthew Read

    Unfortunately you're probably going to have to do a factory reset, which will wipe all the data on the device (it should leave the SD card alone if there is one, though).

    You may be able to do this from recovery mode, which you get into by holding some of the buttons on the device while it boots up. I don't know what buttons the devices has though.

    Another method is to install the Android SDK and the tablet's drivers on your computer, connect the device, and do something like the following from a command prompt (the path may vary):

    cd C:\Program Files\Android\android-sdk\platform-tools
    adb shell wipe data

    Edit: From looking online it appears that there is no button combination to get into recovery, though adb reboot recovery might work. If you're going to install the SDK though you might as well just use the wipe command I posted above.

  • Matthew Read

    To do a factory reset, push the volume down button and the power button at the same time, then follow the on-screen instructions.

  • Sepero

    On my Motorola Cliq (an older phone), I was able to reinstall the firmware, and my phone became completely unlocked. It erased some of my system settings, but all of my apps, data, and files on the device were still there.

    As a test, I also re-flashed my newer phone (LG Motion 4G, Android 4 ICS) and it kept the password lock. Though, my guess would be that I could probably find a way to erase the password with a specially crafted update.zip file. (Here is a link of someone who created an update.zip to erase the pin and gesture password in Gingerbread, and it looks like it would work for my ICS phone too).

    If this makes some people paranoid, then the lesson here is to setup an app which allows you to remotely erase all your data. A knowledgeable person with physical possession of a device will not be stopped by the presence of a password.

  • NoBugs

    This site provides a solution, provided that ADB is enabled on the phone.