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Life doesn't stop when your phone does, which is why the Cat S31 16GB Rugged Smartphone is built to survive. With a powerful battery that lasts encased in a rugged phone that can handle all the elements, this is a phone you can take with you everywhere, to stay connected and get more done. Beneath its durable exterior is a Qualcomm processor and a 2GB RAM, giving it adequate power for handling the essential apps you need.

Cat S31 Logo
Cat S31 Hero


Designed to Last

The Cat S31 16GB Rugged Smartphone is a rugged phone - **IP68 waterproof, dust resistant and drop proof to 1.8m on concrete - with beyond military spec credentials can endure the most extreme conditions, including thermal shocks and salt mist sprays.


Get more Done

The Cat S31 helps you make the most of your day. Its large and bright 4.7-inch 720p HD display can be read in direct sunlight and has an easy-grip design which features a multi-function programmable key - useful for Push to Talk (PTT), or to easily launch its torch or camera.


Waterproof Device

The Cat S31 is a perfect smartphone for use in or around water. It can stay underwater at a depth of 1.2 meters for up to 35 minutes - giving you the freedom to get wet without damaging your phone.


Take Control

Stay in control with the Cat S31's wet finger and glove support features. Whether you're in torrential rain, or in the cold and wearing gloves - you can still operate the phone's touchscreen to access features and answer calls.

*Internet speed depends on network service provider, data plan, location, and other factors.
**IP68 certified: Waterproof up to 5m for 60mins, impervious to dust. Military Standard 810G: Shock and Drop. Operating Temperature: -25°C (-13°F) to 55°C (131°F). Category 4 Vibration. Drop Test: Up to 1.8M (6 ft).


Barcode (GTIN) 5060472350923
Product Type Unlocked Phones
Brand CAT
Model S31
Colour Black
COVIDSafe App Compatible N/A
Phone Type Smartphones
Primary Storage Capacity 16GB
Installed RAM 2GB
Processor Type Quad Core
Processor Model Qualcomm MSM8909 Quad core
Battery Type Lithium Ion
Network Type 3G, 4G
Camera Resolution 8MP
Front Camera Resolution 2MP
Rear Camera Flash Yes
Screen Size (inches) 4.7
Screen Type Touchscreen
Screen Definition High Definition
Internet Browser Yes
Messaging Email, MMS, SMS
Wireless Networking Wi-Fi, Wi-Fi & Cellular, Bluetooth
Bluetooth Enabled Yes
Connectivity Audio Input (3.5mm), Bluetooth, USB 2.0, Wi-Fi
Manufacturers Express Warranty (months) 24

If you feel your product has failed a Consumer Guarantee (as defined by Australian Consumer Law) then you can:

  • Return it to your local Harvey Norman store to initiate an inspection / service call
  • Contact Us at Harvey Norman Online
  • If it is a downloadable product (software or e-Gift Card) please contact Harvey Norman Online

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Cat S31 16GB Rugged Smartphone - Black
CS31-SCB-APJ-AN 5060472350923

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