Android updates are in the spotlight again, thanks to Motorola's questionable dedication to its own recent products. And while you can (usually) count on at least one or two software updates for most flagship phones, sometimes a low-end device comes back and surprises you. Such is the case with the Galaxy Core Prime, a Verizon exclusive in the US which launched with Android 4.4 back in February. At the time the relatively small and underpowered budget phone was promised an update to Lollipop. Quoting David earlier this year: "Oh, and it actually comes with a promise of a Lollipop upgrade, so that's good, though how long it'll take is anyone's guess."
You can stop guessing: it took a little less than eight months. But what's surprising is that Samsung/Verizon decided to upgrade the phone from Android 4.4 all the way to 5.1.1 - the latest version of Android publicly available. (Until later this week, anyway, when Android 6.0 starts to drop for Nexus devices, and hopefully more to follow.) According to Verizon's release notes, the update also includes security patches... and that's it. Samsung goes into a little more detail, confirming that the update does indeed include the Stagefright security patch.
There's no word on how big the update is, but with a bump like this you can basically a full software replacement. That means a Wi-Fi connection would come in handy, and you might need to clear some space on the Galaxy Core Prime's paltry 8GB of internal storage. Remember that any software modifications after a Lollipop update will invalidate any further updates... if indeed this phone ever gets one.