Even if you use jailbreak tools like Cydia, AppSync Unified, or Filza to force-install these specific IPA versions onto an iPhone 4 or iPhone 4S running iOS 7.1.2, the app will remain stuck on the phone verification screen indefinitely. Best Working Alternatives for Legacy iOS Devices

But the screen flashed white.

the downloaded WhatsApp IPA into the Sideloadly window. Enter your Apple ID credentials to sign the app locally.

Find the strings labeled CFBundleVersion and CFBundleShortVersionString .