After installing the store, you will open it… and immediately see: “Google Play Services keeps stopping” or “Authentication required.” That’s because for 4.1.2 also need manual updating.
If you are seeing the "Server Error" or "No Connection" message on an older device, you can fix it by manually installing compatible APKs or resetting core services. Google has officially deprecated support for Jelly Bean, so the built-in update tool often fails. download google play store for android 412 fix