Zero 4 (a.k.a. Infinix X555) is the fourth generation member of the Infinix Zero series. It is an incremental upgrade compared to its predecessor, the Infinix Zero 3, with upgrades on software and camera. Though, the rear camera of the Infinix Zero 4 dropping from 20.7 megapixels to 16 megapixels may seem like a downgrade, the introduction of Optical Image Stabilisation and Laser autofocus more than makes up for it. The true upgrade to the Zero3 is the more premium Infinix Zero 4 Plus.