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

Q & A

Charge and USB keyboard through 1 USB port
“Message Not Sent” notifications for days
format and install new OS to get rid of viruses
Listen to text messages
USB adapter for sim card
How to copy ringtones to Galaxy Ace 2?
how to transfer files to new external sdcard
Not able to flash recovery on my Shield Tablet K1
Systemless Root
What does CWM back up?
After Rooting my phone, I get a black screen, followed by "[app] has stopped working" for every application, any idea what could be going on?
View disk utilization / activity
Does a phone's battery charge when in download mode?
Force browser to hide nav & tab bar
Are APKs architecture-independent?
Can I use Google Cardboard as a normal display?
(Why) does Android connected to Mac not just behave as a normal USB drive?
Force screen to be always on
What is the default DPI of HTC One (M8)?
How to install 6.0.1OTA update on a rooted nexus 5

Topics

2D Engines   3D Engines   9-Patch   Action Bars   Activities   ADB   Advertisements   Analytics   Animations   ANR   AOP   API   APK   APT   Architecture   Audio   Autocomplete   Background Processing   Backward Compatibility   Badges   Bar Codes   Benchmarking   Bitmaps   Bluetooth   Blur Effects   Bread Crumbs   BRMS   Browser Extensions   Build Systems   Bundles   Buttons   Caching   Camera   Canvas   Cards   Carousels   Changelog   Checkboxes   Cloud Storages   Color Analysis   Color Pickers   Colors   Comet/Push   Compass Sensors   Conferences   Content Providers   Continuous Integration   Crash Reports   Credit Cards   Credits   CSV   Curl/Flip   Data Binding   Data Generators   Data Structures   Database   Database Browsers   Date &   Debugging   Decompilers   Deep Links   Dependency Injections   Design   Design Patterns   Dex   Dialogs   Distributed Computing   Distribution Platforms   Download Managers   Drawables   Emoji   Emulators   EPUB   Equalizers &   Event Buses   Exception Handling   Face Recognition   Feedback &   File System   File/Directory   Fingerprint   Floating Action   Fonts   Forms   Fragments   FRP   FSM   Functional Programming   Gamepads   Games   Geocaching   Gestures   GIF   Glow Pad   Gradle Plugins   Graphics   Grid Views   Highlighting   HTML   HTTP Mocking   Icons   IDE   IDE Plugins   Image Croppers   Image Loaders   Image Pickers   Image Processing   Image Views   Instrumentation   Intents   Job Schedulers   JSON   Keyboard   Kotlin   Layouts   Library Demos   List View   List Views   Localization   Location   Lock Patterns   Logcat   Logging   Mails   Maps   Markdown   Mathematics   Maven Plugins   MBaaS   Media   Menus   Messaging   MIME   Mobile Web   Native Image   Navigation   NDK   Networking   NFC   NoSQL   Number Pickers   OAuth   Object Mocking   OCR Engines   OpenGL   ORM   Other Pickers   Parallax List   Parcelables   Particle Systems   Password Inputs   PDF   Permissions   Physics Engines   Platforms   Plugin Frameworks   Preferences   Progress Indicators   ProGuard   Properties   Protocol Buffer   Pull To   Purchases   Push/Pull   QR Codes   Quick Return   Radio Buttons   Range Bars   Ratings   Recycler Views   Resources   REST   Ripple Effects   RSS   Screenshots   Scripting   Scroll Views   SDK   Search Inputs   Security   Sensors   Services   Showcase Views   Signatures   Sliding Panels   Snackbars   SOAP   Social Networks   Spannable   Spinners   Splash Screens   SSH   Static Analysis   Status Bars   Styling   SVG   System   Tags   Task Managers   TDD &   Template Engines   Testing   Testing Tools   Text Formatting   Text Views   Text Watchers   Text-to   Toasts   Toolkits For   Tools   Tooltips   Trainings   TV   Twitter   Updaters   USB   User Stories   Utils   Validation   Video   View Adapters   View Pagers   Views   Watch Face   Wearable Data   Wearables   Weather   Web Tools   Web Views   WebRTC   WebSockets   Wheel Widgets   Wi-Fi   Widgets   Windows   Wizards   XML   XMPP   YAML   ZIP Codes