Wondering when your smartphone will receive the much-anticipated Android 4.4 KitKat update? Well, hopefully this will help to shed some light on the answer to that question. Thanks to a series of leaks, rumors and announcements, we have created an ‘update guide’ containing all the handsets we believe will receive the beefy upgrade this year.

Samsung’s already told us that it’s hoping to bring iris-scanning security features to its upcoming Galaxy S5, but that may not be the only innovation the flagship handset introduces. According to some sources, we can also expect a new high-capacity 2,900mAh battery with rapid charging technology.

A Galaxy S5 concept from Apple Conspiracy.

The Samsung Galaxy S5 will get its grand unveiling at a press event in London in mid-March — not at Mobile World Congress in Barcelona next month — according to a “reliable source.” The device is expected to debut Samsung’s new iris scanning security feature, as well as an improved design made from more premium materials.

We already know what the smaller, cheaper Galaxy Note 3 Neo will be packing under its hood, and thanks to these leaked images of the device, we now know exactly what it’s going to look like, too. Its design is almost identical to that of its bigger brother — the flagship Galaxy Note 3 — just ever so slightly smaller.

Itching to get Android 4.4 KitKat on your Galaxy S4? Of course you are. Unfortunately, it could be a while yet before Samsung’s final release is available to the public, but if you don’t mind living life on the edge and taking a few risks, then you can install a test version of the software right now.

A pre-release test ROM, which works with the international Galaxy S4 with the GT-19505 model number, has been leaked and is available to download for all.