Samsung has been slow in the past when upgrading its latest devices to the newest versions of the Android mobile OS. Android 4.1 Jelly Bean is the latest version and, despite the Galaxy S3 releasing May 29, Samsung is readying the update for its Galaxy S3 and S2 devices only now.

SamMobile reported the news, claiming that a date isn't fixed for the update, which is under testing, but an August/September window is estimated. Apparently, the operating system is also being tested on Galaxy S2 devices.

The S2 has sold 20 million units, Samsung revealed in February 2012. Currently, the Galaxy S3 has sold 10 million devices and is on course to outsell the Galaxy S2.

Samsung Galaxy S3 devices don't seem to be certain for the 4.1 update. SamMobile said that the older device will get the update if testing on the Galaxy S3 "goes well."

The Samsung-dedicated news website also reported high-end devices will be supported, with future versions of Android possible, including the Galaxy Note. A sequel to the Note is rumored for August 15 debut, which SamMobile asserts is an attempt to move attention away from the fabled iPhone 5 announcement.

Android 4.0 Ice Cream Sandwich released on the Galaxy S3 earlier in 2012, while the S3 launched with the operating system.

Samsung is not the only one supporting its latest devices. HTC is also planning to release Jelly Bean for its HTC One X, S, and One XL devices (the One V is a lower-end device, so the hardware probably doesn't support Jelly Bean). Moreover, according to CNET, Asus is also rolling out Jelly Bean for select Transformer Prime and Transformed Pads (the TF300 and TF700 versions)..

Of course, Google launched Android 4.1 Jelly Bean alongside the Nexus 7. The Galaxy Nexus smartphone is the first Android phone to run the 4.1 version of Android. Google said the Nexus S will be getting the update, despite being two years old, and hacks have been released to get the update on the Galaxy S3.

However, users worried about bricking devices or losing data should probably wait a little longer.