Google has started updating its latest Nexus devices with Android 5.1.
You probably don't have Android 5.0 Lollipop on your Android phone just yet, but that's not stopping Google from pressing onwards.
The company has announced on the official Android blog that Android 5.1 is on its way out to supported devices. It mentions the Nexus 6 smartphone and Nexus 9 tablet specifically, as you might imagine.
Android 5.1 apparently "improves stability and performance and offers a few new features."
Those new features include support for multiple SIM cards. This feature is popular in developing countries, where handsets are often shared and multiple accounts held.
Device Protection, meanwhile, ensures that your phone will stay locked in the event of theft, even if the thief manages to perform a "return to factory settings" wipe and reset.
Android 5.1 also brings High Definition voice calling support. This should supply crystal-clear audio quality on voice calls over supported networks. Google mentions the US networks T-Mobile and Verizon as being compatible, but most UK networks support it in some form.
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Finally, Google, mentions the ability to join Wi-Fi networks and to control your paired Bluetooth devices direct from the Quick Settings menu.
But really, Android 5.1 is about those bug fixes, after a particularly glitchy roll-out of Android 5.0. Here's hoping 5.1 makes its way through to newer phones nice and quickly.