More than 20 million people already own Galaxy S3 smartphones, and all of them anxiously await the update to Android 4.1 Jelly Bean. Last week, during its IFA 2012 Unpacked event in Germany, Samsung promised that its flagship devices will soon get the upgrade. The list includes the Galaxy S3, Galaxy Note 10.1, and Galaxy Note, but older Samsung devices may get the upgraded OS too.

A slew of Jelly Bean leaks have surfaced recently for the Samsung Galaxy S3, allowing users to install, at their own risk, a pre-release Android 4.1 ROM. Most of those leaks, however, were available only for the international version of the handset. Eventually Android 4.1.1 leaked for T-Mobile's Galaxy S3 as well, and for the Bell Galaxy S3 variant. The latter also works on other carriers in the region.

These leaks are not Jelly Bean-based custom ROMs, but leaked firmware versions. The latest Galaxy S3 Jelly Bean version, I9300XXDLI5, can be installed on certain models and can be downloaded and flashed right away if users no longer want to wait for the real deal. Users are advised, however, to wait for the official upgrade.

According to Sam Mobile, the latest leak on Sept. 9 is the "most stable leak EVER." On the other hand, the publication said the exact same thing about the previous leak, dated Sept. 7, i.e. version I9300XXDLI4. Either way, these two pre-releases build several new things and fix a number of glitches, as follows:

I9300XXDLI4

This pre-release claims to fix the brightness issue, improve Wi-Fi reception, bring RAM optimizations, speed up battery charging, make App Drawer much smoother, and allow Apps to open faster.

I9300XXDLI5

Meanwhile, the latest I9300XXDLI5 claims to fix the Maps compass issue, as well as the Maps arrow for direction, speed up the user interface and make it smoother, improve Smart Stay, and eliminate FCs. Both claim to be very fast, smooth and stable.

Samsung has not yet announced any official release dates for its Samsung Galaxy S3 update, but it should come by the end of this month for the U.S. version. If you cannot wait for the official upgrade, you can, at your own risk, try out one of the leaked pre-releases. For I9300XXDLI4 dated Sept. 7 click here, and for the Sept. 9 I9300XXDLI5 go to this link. For the T-Mobile Samsung Galaxy S3, you can find the OTA version here.