FIX Google Play Store Error Code 505/504 [UPDATED SOLVED]
Learn to FIX Google Play Store Error Code 505/504 [UPDATED SOLVED]. When you try to update or install an app or game in Google Play Store, an error comes up saying "Unknown error code during application install: -505". The error 505 is especially common in devices that recently update to Android Lollipop, Marshmallow and Nougat. If you can't install apps/games because of Google Play Store error 505, try these solutions.
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