Remember: Android 5.1.1 is nearly a decade old. The Play Store may feel slow, and some apps won’t install. But for basic functionality, this guide will resurrect Google services on your aging Lollipop device.
: Open your "Downloads" folder and install them one by one. Do not open them until all four are installed. Install Account Manager. Install Services Framework. Install Play Services (this may take a minute). Install Play Store. Reboot : Hold the power button and restart your device.
These are server-side authentication failures on older Android versions. Workaround:
If the Google Installer fails, manually installing the correct APK versions is more reliable.
By default, Android blocks the installation of apps from outside the Google Play Store for security. on your device. on some models). Unknown Sources toggle and turn it Accept the warning message that appears. Step 2: Download the Correct APK Files