It is critical to use reputable mirrors to avoid malware when downloading legacy APKs:
After installing:
To get the store running on an older device, you need to sideload an older version of the Play Store that was optimized for Android 4.0.3 but updated enough to connect to Google’s servers. Google Play Store Apk Download For Android 4.0.3
Guide: Installing Google Play Store on Android 4.0.3 (Ice Cream Sandwich) It is critical to use reputable mirrors to