I trashed my Galaxy Core Prime a few weeks ago (1st & last Samsung I'll ever own), now I'm back on my Ultimate 2.  I wiped the data, restarted, and no sooner than I finish the initial setup process, 2 LG updates immediately start downloading, so I didn't have choice.  After the updates finished, I rebooted, and the lockscreen had a button at the bottom for "emergency call", and a message under the clock widget that read "No sim card".  Furthermore, the lockscreen shortcuts were gone, so I uninstalled the keyguard update.

After another reboot, the lockscreen was completely gone!  I had issues in the past like this, if I disabled the LG Home launcher, or removed the ChromeWithBrowser.apk, and a few other ROM changes.  And once the lockscreen was gone, I couldn't figure out how to get it back, short of restoring a backup image, or worst case, resetting the phone again.

So when the LG updates started downloading after another reset, I cancelled the keyguard update, but I couldn't stop the SystemUI Update Helper in time.  Anyway, I started Titanium Backup, froze the LG update apps, opened root explorer, deleted the SystemUI update .apk in '/data/app-system' (couldn't be uninstalled from App Manager), and rebooted.

Guess what?  Problem solved.  Now if only I could fix the disappearing lockscreen without resetting the phone.

I'm still running the factory ROM, with a few minor mods, in case you're wondering.

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