To get Viber working on iOS 4.2.1, you cannot use the current version from the App Store. You need a "Legacy" version of the app.
To a modern user, this sounds like asking for a horse-drawn carriage with a USB port. iOS 4.2.1 was released in November 2010. It ran on the iPhone 3G and the original iPad. Today, it’s a fossilized layer of digital sediment, buried under 16 major iOS versions. But for a small community of retro-tech enthusiasts, it’s a pristine time capsule. Viber .ipa for ios 4.2.1
He dialed his mother’s number. The connection tone was crisp, slicing through the thousands of miles between Berlin and Buenos Aires. When she picked up, her voice sounded like she was standing right next to him in the cold German rain. "Leo? Is that you?" To get Viber working on iOS 4
To understand why a specific .ipa is required, let’s review Viber’s compatibility: But for a small community of retro-tech enthusiasts,
Every .ipa file downloaded from the App Store is encrypted with Apple’s FairPlay DRM, tied to the specific Apple ID that downloaded it. Even if you find an old Viber 1.0 .ipa file, it will only install if: