: If the app fails, the most reliable way to access messages on iOS 4.2.1 is through the device's Safari browser by visiting messenger.com or m.facebook.com.
To install a legacy IPA file on iOS 4.2.1, your device must generally meet these criteria: facebook messenger ipa for ios 421 download top
Use classic tools like Greenpois0n or Redsn0w to open up your iOS 4.2.1 filesystem. : If the app fails, the most reliable
You might want to check out the Checkmate, Store! tweak in Cydia, which helps your device request older, compatible versions directly from the App Store if you've "purchased" them on a newer account previously. How to Jailbreak Your iOS 4.2.1 Device tweak in Cydia, which helps your device request
: Some users download IPA files to install apps on jailbroken devices. However, even on jailbroken devices, it's recommended to use official sources when possible.