Colour: Black

CAT S31 is built to survive in tough conditions, thanks to a rugged exterior. But it runs on Android, so you get great features too.

• Water and dust-resistant
• Long battery life (4000 mAh)
• Bright HD display for using outdoors

Sim Free

In Stock



Credit Details

A1 Comms Ltd. acts as a credit intermediary and offer credit products provided only by Close Brothers Retail Finance. Close Brothers Retail Finance is a trading name of Close Brothers Limited. Close Brothers 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.


The durable CAT S31 is a true rugged phone, wrapped up in a tough exterior that’s water, dust and drop proof, finished with a scratch resistant screen. However hands-on your job or environment is, your CAT S31 smartphone can handle it.


CAT S31 comes equipped with a 4.7-inch HD display that’s bright and clear enough to use when you’re outdoors, in direct sunlight. The screen even features special, sensitive technology that means you can use it with a wet finger or when wearing gloves.


CAT S31 runs off a chunky 4000 mAh battery that can last up to 38 days on standby, and 30 hours of talk time. So when you’re out of office, or working on-site all day, you don’t need to worry about finding a plug socket; CAT S31 just keeps going.


Because CAT S31 is powered by Android, it has access to all Google’s popular features, as well as the 2 million+ apps in the Google Play store. From Google Play Music for keeping yourself entertained at work, to Google Maps for finding the location of your next job.

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 - Your monthly price plan charge will increase every year in March (EE), April (Vodafone) or May (Three) by the rate of most recently published RPI. Other prices, such as call charges and roaming costs, may also go up during your plan. Three monthly price includes £5 discount for paying by direct debit.

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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