Given that Apple no longer signs iOS 7.1.2 (you cannot restore to it officially unless you have SHSH blobs), the community keeping these devices alive is essentially running a preservation society.
: If your goal is to get apps from the official store, ensure you have added the Legacy iOS Repo ( http://repo.legacyios.com ) to Cydia to access updated fixes for the iOS 7 App Store. Critical Security Considerations ipa files for ios 712 patched