Telecom company T-Mobile has confirmed that it has begun rolling out the Android 5.1.1 update for its Nexus 6 devices.

The update, which was released last weekend, includes support for the company's Wi-Fi calling service.

The arrival of the update was confirmed by T-Mobile employee Des Smith through his Twitter account, according to 9to5Google.

"This just in," he tweeted on May 22. "@TMobile has approved the #Nexus6 Wi-Fi Calling Software Update! Happy Memorial Day Weekend!"

A day after sending out the tweet, T-Mobile started rolling out the update.

The Android 5.1.1 update with build number LYZ28E can be downloaded over the air and has a file size of 125MB. However, the update is only currently available to a handful of users due to its gradual roll out. But other users of T-Mobile's Nexus 6 can expect to receive the update in next coming weeks.

Talks about the Wi-Fi calling support for the handset earlier in May after Smith revealed that T-Mobile was closely working with Google to fix various bugs in the Nexus 6 that affected this feature, Digital Trends reported.

Then, after a series of tests, Smith hinted that the progress between the two companies is successfully moving forward.

The Nexus 6 is the last member of the Nexus line to receive the latest version of the Android OS update. As for non-T-Mobile customers, a leaked internal memo from Sprint revealed that the Android 5.1.1 update is scheduled to arrive for the company's Nexus 6 on May 26.

Based on the document, the latest update has the build number LMY47Z and comes with general Android upgrades and security improvements for the Nexus 6.

Although the document didn't reveal additional details regarding the update, Android Police noted that the software will probably have the same general features as to what is being offered by T-Mobile.