U.S. carrier T-Mobile has begun rolling out the latest Android 5.1.1 Lollipop update to the new Samsung Galaxy S6 and Galaxy S6 Edge on Monday, bringing key bug fixes and new features to the devices. The firmware’s release comes about two weeks after a video emerged online, showing an early build of Android 5.1.1 Lollipop update running on both the Galaxy S6 and Galaxy S6 Edge.

The new Lollipop update adds a simplified exposure control system in the camera app, and brings a new wallpaper parallax effect. The user interface has also received some changes, such as the option to remove the S Finder and Quick Connect buttons from the notifications shade, SamMobile reported, adding that the update has also boosted the performance of both the devices.

In addition, the update also features the Guest Mode, which was not included in the Galaxy S6 and the Galaxy S6 Edge, Android Central reported. The Guest Mode allows switching to a guest profile, which prevents other users from accessing the primary user’s personal data and settings on the device.

However, it is not clear whether the update fixes the memory handling issue, which was recently discovered to have affected the Galaxy S6. Many users of the device reported launcher re-draws and apps needing to reload after they were removed from memory, according to XDA Developers.

While many users have reportedly confirmed that they are receiving the over-the-air update, T-Mobile has not yet mentioned the OTA update on its website.

Earlier this month, SamMobile released a video, showing an early build of Android 5.1.1 Lollipop for the Samsung Galaxy S6 and Galaxy S6 Edge.

Here are the firmware details:

Galaxy S6

Model: SM-G920T

Country: USA (T-Mobile)

Version: Android 5.1.1

Changelist: 90673209

Product code: TMB

PDA: G920TUVU2COF6

CSC: G920TTMB2COF6

Galaxy S6 Edge

Model: SM-G925T

Country: USA (T-Mobile)

Version: Android 5.1.1

Changelist: 90673209

Product code: TMB

PDA: G925TUVU2COF6

CSC: G925TTMB2COF6