With yesterday's announcement and release of the Nexus 5, the age of Android 4.4 KitKat has officially begun. Now HTC and Google's own Motorola are getting on board and confirming which of their phones users can expect to support the new mobile OS.

Motorola users can check their phone's compatibility using the manufacturer's handy chart. A simple search for carrier and model will reveal which phones are eligible for the strategically named upgrade. According to Droid Life, Motorola's KitKat-compatible phones include all versions of the Moto X, as well as new Droid phones like the Droid Ultra, the Droid Maxx, and the Droid Mini. Meanwhile, notable omissions include the Razr HD and the Razr Maxx HD.

HTC has also announced its Android 4.4 plans. According to Engadget, Google Play editions of the HTC One should see the update within 15 days. The developer and unlocked versions will receive it within 30 days and everyone else should expect it in 90 days. HTC phones running KitKat will still implement the manufacturer's custom Sense UI 5.5 that's been running since Android 4.3. News on HTC One Max and HTC One Mini compatibility is coming soon.

Can Android 4.4 help solve the fragmentation problem that has plagued Google's operating system for years? As more manufacturers announce support for the upgrade, we will see if that dream finally becomes a reality.

Anyone who needs to break off a piece of that KitKat right now, though, should check out the new Nexus 5, available now on the Google Play store unlocked for just $349. It's coming to Sprint and T-Mobile, as well as several retailers later this month.

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