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DUAL SIM - Free screen replacement warranty
From £200.00exVAT
From £240.00incVAT

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Black, 16GB Buy
CAT S31 - Black / Grey
  • Ex VAT ...
  • Inc VAT ...
  • CodeCATP-S31B-P22


Cat S31 SIM Free UK Clove Banner

Cat S31 SIM Free & Unlocked / UK

Be Unstoppable!

CAT, as a brand, continues to impress us with their range of rugged smartphones. With the CAT S31, they have listened to customer feedback and have produced a phone which can be relied upon to work for several days without charging.

It is also built to handle harsh conditions being IP68 certified and MIL Spec 810G.

Reasons to buy the CAT S31 Unlocked

  • Android 7 Nougat & productivity apps
  • 4.7-inch HD (1280 x 720) screen
  • Corning Gorilla Glass 3 (1.1mm thick)
  • 1.3 GHz Quad-core processor
  • 8MP main camera with LED flash
  • IP68 - water-resistant to 1.2m for 35 minutes
  • Drop-proof to 1.8m
  • Long-lasting 4,000 mAh battery

SIM Free /Unlocked UK Stock

Clove Technology supply the CAT S31 factory unlocked without any contract or tariff. You are free to use any SIM card of your choice.

The S31 is a dual-SIM device, with 2x Nano SIM card slots. You can use SIM cards from network providers of your choice.

Use both a personal and work SIM card in the same phone or maybe a local and international SIM, the choice is yours. Or if you need only one SIM slot, leave the other empty.

Colours and memory variants

The S31 is available in one colour combination: black/grey with yellow trim. The phone has an internal storage capacity of 16GB, with 2GB of RAM.

Micro SD cards, up to 128GB, can be installed to expand the storage. Please be aware that micro SD cards use SIM slot 2, therefore dual-SIM functionality is not available if using a micro SD card.

Box Contents

  • CAT S31 Rugged Smartphone (SIM Free / UK)
  • Quick Start Guide
  • Warranty card
  • Mains charger and micro USB cable
  • Battery Share cable
  • Screen protector
  • Earphones

Overview of the CAT S31 Unlocked

The CAT S31 is the follow-up to the successful CAT S30, which was a competitively priced rugged phone, which was perfect for professionals who work outdoors.

The S31 continues this trait and improves upon the specification, particularly with the 4000 mAh battery for increased time between charges. There has also been a general updating of the specification. The display now benefits from having a high-definition resolution, while the internal storage and RAM have been increased.

You still have the rugged design which is able to withstand drops of, up to, 1.8 metres and the wet finger and glove support enables usage in challenging environments.

Stay Connected

Ask anyone what they want from a smartphone and the answer will probably be "longer battery life!"

CAT has listened to this feedback and has provided the CAT S31 with a large 4,000 mAh battery. This gives users up to 15 hours continuous talk time on a 3G connection and up to 38 hours standby in standard conditions.

So when you are working in the outdoors or enjoying a hiking trip, you don’t need to rush back to charge your phone.

Go Beyond Rugged

Most rugged phones will tout a MIL-SPEC 810G and IP68 rating. The CAT S31 matches these claims and it also takes further steps.

It adheres to IP68 certification offering water-resistance to 1.2 metres for up to 35 minutes. It's also tough enough to handle thermal shocks, salt mist spray and fine particulates. This makes it ideal for working in harsh environments.

The 4.7-inch screen has been manufactured with high-quality scratch-resistant Corning® Gorilla® Glass 3. Finally, the handset has been drop proof tested onto concrete from, up to, 1.8 metres.

Cat S31 SIM Free UK Clove Electricals

Take Control with Additional Features

Glove Mode

Accessible from the settings, Glove Mode changes the sensitivity settings of the screen so that it is compatible with gloved hands.

Easy Grip Design

Wrapping around the whole handset is a textured, grippy finish. This keeps the phone stuck to the spot, even when rested on inclines and slippy surfaces.

It's also easy to locate in a deep pocket or bag and easier to hold in the hand than the glossy, anodised finished of comparable fashion-style smartphones.


If you have a group of workers in a team, each with their own CAT S31 handset, the PTT button can be utilised with compatible apps for immediate short to medium range communication.

SOS / Lone Worker App

Pre-installed on the CAT S31 is a lone worker app that can be customised. Through this app, a worker in distress or in need of attention can quickly call for assistance, with options to share GPS location.

Easy Read Display

Alongside the Glove Mode mentioned above, the CAT S31 screen has also been designed to minimise glare from direct sunlight and other sources of bright light.

App Toolbox

Looking for some useful and relevant applications? Sick of filtering through thousands of silly games and distractions on the Play Store? With the App Toolbox, you can browse through work-related applications, filtering by industry or keyword.

Cat S31 SIM free UK Clove Work Tools

© 2017 Caterpillar. All Rights Reserved. CAT, CATERPILLAR, BUILT FOR IT, their respective logos, “Caterpillar Yellow”, the "Power Edge" trade dress as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.

Bullitt Mobile Ltd is a licensee of Caterpillar Inc.

We cannot guarantee that all gloves will work with the Glove Mode feature.

Battery times (talk time, standby time, and more) are based on 3G and are subject to network and phone usage.

All other trademarks, trade names, product names and logos are the property of their respective owners. Any rights not expressly granted herein are reserved.


SIM Free & UnlockedYes
Operating SystemAndroid
  • Version7.0 (Nougat)
  • Custom Skin
  • Speed1.3GHz
  • Dual Core
  • Quad CoreYes
  • Make/ModelQualcomm MSM8909 Quad core
  • Other
Expansion SlotYes
  • TypeMicroSDXC
  • Capacity (Up to)128GB
Internal StorageYes
  • Capacity16GB
  • TouchscreenYes
  • Size4.7
  • TypeHD IPS LCD
  • Resolution 1280 x 720
  • OtherWet finger/glove on working technology/ Super Bright Display/Corning Gorilla Glass 3 (1.1mm thick)
  • Frequencies850 / 900 / 1800 / 1900 MHz
  • Speed
  • Frequencies850 / 900 / 1900 / 2100 MHz
  • Speed
  • Frequencies1, 2, 3, 5, 7, 8, 20
  • Speed
  • Version4.1
  • Functions
  • Version802.11 b/g/n
  • Version
  • DataMicro USB v2.0 - USB-OTG
  • PowerMicro USB v2.0
  • Audio3.5mm jack
  • Video OutYes, wireless via Miracast / Google Home
Device Controls
  • Keyboard
  • Optical Trackpad
  • Hardware ButtonsPower / Volume / Home / Recent app / Back / Volume up/down / Prgrammable Key
  • Other
  • Antenna TypeGPS / GLONASS / Beidou
  • A-GPSYes
  • Built-in SoftwareGoogle Maps
  • Megapixels8 MP
  • FlashAuto focus w/ LED Flash
  • Camera Lens
  • Other
Front Facing CameraYes
  • Type2 MP
  • AccelerometerYes
  • Proximity SensorYes
  • Digital CompassYes
  • GyroscopeYes
  • Light SensorYes
  • Formats
  • Recording
  • Formats1080p at 30fps
  • Recording720p at 30fps
Near Field Communication
FM RadioYes
  • Capacity4,000 mAh
  • TypeNon-removable Li-ion
  • Removable
Call Time
  • GSM
  • 3G
Standby Time
  • GSM
  • 3G
Dimensions146 x 74.42 x12.6mm
Weight 200g
SoftwareGoogle Play, Google App Suite
OtherIP68 certified: Waterproof up to 1.2m for 35mins, MIL-SPEC 810G, Shock and Drop, Operating Temp: -30°C (-22°F) to 55°C (131°F), Category 4 vibration
Warranty24 months



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