The Uninstall and Force Stop buttons are greyed out

[k_misc]

An app called RocketDial is installed in my OnePlus 2 mobile and is listed as a device administrator and I am unable to uninstall it because it won't be unchecked in the Device Administration window and its Uninstall and Force Stop buttons are dimmed. Can anyone of a help, please.

 

[mhinc]

Take your phone into Safe Mode, uninstall the app, and then restart.
Done and Done

 

[Javier P]

Also, before trying to uninstall it make sure to set the stock dialer back as default.