Installing an IPA on such an old device typically requires specific tools:
For users seeking a Facebook Messenger IPA for iOS 4.2.1, here is the reality of current compatibility and the available workarounds. facebook messenger ipa for ios 4.2.1 download
Running modern apps like Facebook Messenger on a legacy device like the iPhone 3G or iPod Touch 2nd Generation (stuck on iOS 4.2.1) is a significant technical challenge. As of , the official Messenger app requires at least iOS 12.4 or higher to function. Installing an IPA on such an old device
Official support for iOS 4 ended years ago, but these methods can help you find a compatible .ipa file: ios-ipa-collection directory listing - Internet Archive facebook messenger ipa for ios 4.2.1 download