. Because this version of Android is older, you must use verified, safe sources to avoid malware. Verified APK Download Sources
Even with a verified APK, Android 5.1.1 can be stubborn. Try these fixes: you must use verified
Most Android 5.1.1 devices use . When downloading the APK, ensure the file matches your device's DPI (dots per inch) or select the "nodpi" version, which works on all screen types. 3. Download and Install or a clunky user interface.
If you are running an older device on , you may have noticed that the Google Play Store sometimes fails to update automatically. This can lead to missing apps, download errors, or a clunky user interface. you must use verified