Colour: Black

Rugged by design and rugged by nature, CAT S31 is built to last. And it’s perfect for any scenario, because it also operates on Android.

• Massive 4000mAh battery
• Drop proof and water-resistant
• Screen works with wet hands and gloves

Sim Free

In Stock



Credit Details

A1 Comms Ltd. acts as a credit intermediary and offer credit products provided only by Klarna Retail Finance. Klarna Retail Finance is a trading name of Klarna Limited. Klarna Limited is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and Prudential Regulation Authority. For more information please visit Finance is only available to UK residents over 18, subject to status, terms and conditions apply.


CAT S31 is designed to withstand any situation or scenario. How? It comes built with a rugged design that’s waterproof up to 1.2m for 35 minutes, and is also drop-proof up to 1.8 meters. It’s the perfect smartphone for having with you on-site.


Need a super durable display, as well as design? CAT S31 is the phone for you. A 4.7-inch HD display is protected by Corning Gorilla Glass 3, giving it enhanced protection. Not only that, wet finger/gloves-on screen technology means you can use it even more scenarios.


You get to enjoy the benefits of having a long battery life on the CAT S31, which comes with a huge 4000mAh power unit. This gives you loads of juice for long days out and about, or traveling between jobs where you don’t have a power cable.


Enjoy all the Android features and functions expected on a modern smartphone. Running the Android Nougat operating system, you can enjoy enhanced security and download any of the 2 million+ apps available to you from the Google Play store.

Meet the CAT S31

Full CAT S31 Specification

4.7-inch HD
Display Technology:
TFT capacitive
720 x 1280 pixels (312 ppi)
Qualcomm MSM8909 Snapdragon 210
Quad-core 1.3GHz Cortex-A7
Card Slot (microSD):
Up to 64GB
146 x 74.4 x 12.6 mm
200 g
Secondary Camera:
Video Camera Quality:
Waterproof Rating:
SIM Type:
Wireless Connectivity:
WiFi, Bluetooth (v4.1)
Connectivity Port:
Battery Capacity:
4000 mAh
Talk Time:
30 hours
38 days
Network Bands:
LTE Cat:
Cat 4 (150/50 Mbps)

The legal bit:

All pay monthly offers subject to security and credit check. Charges will apply for paper billing. Charges may also apply for non-Direct Debit payment, unless on the EE network. Promo codes cannot be used in conjunction with any other offer.

RPI Price Increase - Each year, your Pay Monthly airtime tariff will be adjusted according to the Retail Price Index (RPI) rate of inflation. Your bill will be adjusted in March (EE), April (O2 & Vodafone) and May (Three) by the rate announced in January (EE & Three), February (O2) and March (Vodafone).

Trade-in - Your trade-in value is subject to you sending in your old device within 14 days of receiving your new one, as well as the condition criteria your old device is valued under, including the removal of any iCloud, Google and Samsung accounts, and the associated IMEI not being blacklisted. Full terms apply.

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