Removing an app protected from uninstall by password and with System Owner permissions?

Question

I want to ask, if there is a way to remove an app that is protected from uninstall by password and has Device-administrator permissions granted?

I am using an LG L90 phone with android 5.0.1 L (NOT ROOTED) Apparently it has a safe mode, as 1 year ago I accidently booted into it.



So here is the story what happpened:
I am developing an application that is supposed to limit access to for example work phones. It is password protected from uninstall, and I am regularly testing it on my phone. But in the most recent version, a bug slipped in which broke SHA256 hashes and caused passwords to be not recognized by the app, which means that I have locked myself out of games and youtube. Is there a way to remove this application? (Keep in mind that it has device administrator permissions and pops up with lock-out screens when on the "App uninstall" screen).


If the safe-mode thing could help, how would I boot into it?


— Rph | Sources

Answer

Of course you can uninstall from the safe mode. Disable the authorization in the Device Administrator first.



Step for booting in safe mode:




  • From any screen, press and hold the Power key.


  • Touch and hold Power off. Review the 'Reboot to safe mode' screen,' then tap OK.


  • The device should restart in safe mode and 'Safe mode' will appear in the lower-left.


  • Uninstall the app that is causing a problem.



— esQmo_ | Sources

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