Over the past couple of weeks we’ve been hearing quite a few rumors regarding an upcoming Android 4.4 KitKat update for Samsung’s former flagship smartphone of 2013, the Galaxy S4, now it looks as if the South Korean company has started internally testing the much-anticipated upgrade. However, according to an online publication the build is currently not stable enough to be used as a daily driver, so we will have to wait a little longer before the final version starts rolling out.

The Galaxy S4 was released back in April, 2013, and packs a 5-inch Super AMOLED display with a resolution of 1080 x 1920, a 1.6GHz quad-core Cortex A15 processor, a PowerVR SGX 544MP3 GPU, 2GB of RAM, 16GB/32GB/64GB of internal storage (expandable up to 64GB via microSD), a 13-megapixel rear-facing camera and a removable 2,600 mAh Li-Ion battery.

If all the leaks and rumors turn out to be true, the update could start rolling out to the handset at the end of this month. Unfortunately, there’s no solid evidence to back up this theory, so for now we can only speculate.

• SourceSamMobile