The CAT S31's screen size is 4.7 inches with 720 x 1280 pixels resolution.
There is a Qualcomm MSM8909 Snapdragon 210 Quad core 1.1 GHz processor (CPU).
The phone runs on the Android 7.0 Nougat operating system (OS).
You can take photos or capture video with the phone's onboard 8+ megapixel camera.
There is also a secondary front facing camera with 2+ megapixels resolution.
Internal memory is 16 GB. An external, MicroSD, MicroSDHC, microSDXC (up to 128 GB) expansion slot is available for increased storage capacity.
The phone is powered by a Lithium-Ion (Li-Ion), 4000 mAh battery.