If you guys want high-quality, and more FREE tech content, You can Support me on Patreon and get some great rewards!\rbr\rbr\rbr\rbr\rbrHow To Fix Unknown error code during application install: -505 On Play Store ?\rbr\rbr\rbrThis Error occurs when you try to download or update an app \rbr\rbr\rbrMethod 1: \rbr\rbrClear Cache and Data \rbr\rbri) Google Play Store .\rbrii) Google Play Services .\rbr\rbrIf you see Google Services Framework , Download Manager.Clear their Cache and Data as well .\rbr\rbrı)If you are updating an App then try to clear the cache and data of the app in question as well .\rbr\rbriv) Remove Your Google Account and Re-Add it again .\rbr\rbrIf you have more than one google Account Associated,Remove everyone.\rbr\rbr\rbrStep 1: Go to settings,and then accounts,and then Google \rbr\rbrStep 2: Remove your all google(gmail) accounts .\rbr\rbrStep 3: Open Play Store and Add it again .\rbr\rbr\rbrRestart your Phone and Try to Install or update an App .\rbr\rbr\rbr\rbr\rbrMethod 2: \rbr\rbrCheck your Data and Time and also Time Zone .If its not correct .Please correct it and try to Install or update an App .\rbr\rbr\rbr\rbrMethod 3: \rbr\rbrUninstall the Updates of Google play store if you have it.\rbr\rbrGo to Settings,and then Apps ,and then Uninstall Play Store Updates .\rbr\rbr\rbr\rbrMethod 4:\rbr\rbrThis method requires your phone to be rooted\rbr\rbrIf you had installed app before and uninstalled it without clearing its cache and data ,there might be chance that some files are leftover.\rbr\rbrStep 1: Allow Installation of Apps from Unknown sources\rbr\rbrStep 2: Go to and Do a search for ES File Explorer .Download it and Install it .\rbr\rbrStep 3: Enable Root Explorer\rbr\rbrStep 3: Go to devicedataapp \rbr\rbrand if you see the folder of the app that you are trying to install ,Just Delete it .\rbr\rbrRestart your Phone and Go to Play Store and try to download or update an app .\rbr\rbr\rbr\rbrThats all \rbr\rbr\rbrThanks for watching,if you like this tutorial ,please like and share .