It shouldn't come as a surprise to you that Samsung is working on a Galaxy S4 Mini successor. First details of the Galaxy S5 Mini trickled out today, courtesy of SamMobile. The phone, bearing model number SM-G800, allegedly packs a 4.5-inch HD (1280 x 720) display, 8 MP rear and 2 MP front cameras, 16 GB of expandable storage, 1.5 GB of RAM and 2,100 mAh battery. The Galaxy S5 Mini runs Android 4.4 KitKat out-of-the-box, according to the report, and that it will also feature IP67 certification. However, the heart rate monitor, found in the Galaxy S5, won't be showing its face in the new Mini.