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Presenting the CAT S31, a rugged smartphone that's constructed with survival in mind. Featuring a scratch resistant Gorilla Glass screen with wet finger/glove support, high-end processor, huge battery and rear camera - the CAT S31 includes flagship worthy features without the delicate exterior. Ideal if you spend most of your time outdoors in wet/dusty conditions.
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The CAT S31 – A Virtually Indestructible Android Smartphone

cat s31 android smartphone rugged waterproof phone

If you spend much of your time outdoors in extreme wet or dusty conditions, your current phone is probably battered and on its last legs. Presenting the CAT S31, a tank of a smartphone that’s capable of withstanding the most severe punishment from all angles. Featuring a colossal battery, rear camera, gorilla glass screen and wet finger support – the CAT S31 is perfect for those who need a rugged phone that’s built to survive.


Constructed with a solid metal frame, the CAT S31 may not look like an elegant flagship model. But what it lacks in the looks department, the S31 makes up for with sheer toughness. Covered in a thick textured rubber, giving the device a great amount of grip that will never slip out of your hands. Even if you do manage to drop the phone, it’s likely that it will survive – as it has been drop tested from a 1.8m height onto concrete.

The 4.7-inch HD display is fitted with a Gorilla Glass cover that prevents any screen scratches or smashing. The screen is very bright and viewing under direct sunlight couldn’t be any more sharper. If the sun has been replaced with heavy rain, then the screen can automatically switch to a wet finger mode for a responsive interface, with the option to enable a glove mode too.

Certified with an IP rating of IP68, the CAT S31 is waterproof in up to 1.2 meters of water for 35 minutes and impervious to dust. Also with military standard testing, the S31 can function within temperatures of -30°C up to 55°C.


Equipped with a rear 8-megapixel camera with integrated autofocus, the S31 can capture stunning images with vivid colours and stunning levels of clarity. The front facing camera has a 2-megapixel sensor that’s perfect for social media-ready selfies. The in-built LED flash can also double as torch for when you’re working in low light-conditions.

Powered by a massive non-removable Li-ion 4,000mAh battery. The S31 is capable of lasting more than a day, with more than 20 hours of talk time, 10 hours of web browsing and 300 hours of standby time. If you’re worried about draining the battery, there’s a convenient application that allows you to set a minimal charge level so you always have power.

Built with the Snapdragon 210 chipset, Quad core processor, Andreno 304 graphics processor and 2GB RAM. The powerful chipset delivers ultra-smooth performance and a highly responsive interface. Allowing you to load demanding applications in seconds, open multiple apps at once and play the latest games without any lag or interference. With 16GB of internal memory, there’s the option to add up to 128GB more memory via the micro SD card slot.


cat s31 rugged waterproof water resistant smartphone

I use the S31 for work. I have an S7 Edge and couldn't trust it on site so got an S31. It is a work tool, gets treated as such and works brilliantly! Fully recommended.
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146 x 74.4 x 12.6 mm (5.75 x 2.93 x 0.50 in)


200 g (7.05 oz)


Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)


4.7" TFT capacitive touchscreen


Android 7.0 (Nougat)






Primary - 8 MP, autofocus, LED flash

Features -Geo-tagging, touch focus, face detection

Video - 720p@30fps

Secondary - 2 MP


Vibration, MP3, WAV ringtones, Loud Speaker, 3.5mm Jack


Wi-Fi 802.11 b/g/n, hotspot


Sensors - Accelerometer, proximity, compass

Messaging - SMS(threaded view), MMS, Email, Push Email, IM

Browser - HTML5

Java - No

- MP4/H.264 player

- MP3/WAV/eAAC+/Flac player

- Photo/video editor

- Document viewer


Non-removable Li-Ion 4000 mAh battery


Colours - Black

Network Unlocked?

Yes - currently every phone we sell is Network Unlocked - ready for you to use with your network carrier of choice.