Cat S31 (Universally Unlocked, Brand New)


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The Cat S31 is the next in line from Caterpillar’s S range of ruggedized phones. Intended for tough working and playing alike, the S31 marries high-specs and high-protection levels to get through any type of day imaginable. It is, like every product in our store, covered by our no quibble 14 Day Returns Policy. The S31 achieved a Mr Aberthon ranking of 9.7/10.

Product Highlights:

  • Universally unlocked to AT&T, T-Mobile and Select Prepaid GSM Supported Carriers (Please call your network provider for further assistance to confirm its compatibility.)
  • Extremely rugged: IP68, MIL-STD-810G compliant, Corning Gorilla Glass 3
  • Android 7.0 (Nougat)
  • Extremely Rugged: IP68, MIL-STD-810G compliant and Corning Gorilla Glass 3

Product Description

It’s easy to think that you’ll always be careful enough with your smartphone. That you won’t drop it, or that it won’t fall out of your pocket. You are, of course, fooling yourself. You will drop your phone at some point and will endure that heart-stopping moment when you pick it up again. Even if you’re lucky enough to have a still intact smartphone, the experience isn’t nice. That’s why phones like the Cat S31 exist.

The S31 isn’t just for the clumsy amongst us, though. It’s also for those people in industries who seem to eat smartphones alive. Some jobs just don’t suit smartphones, especially those with full-face glass screens. You can add all the toughened glass you like, but it will forever be the weak spot of the phone. So what’s the answer? Well, the answer is smartphones like the Cat S31. As well as a protective case that is rated to survive a drop from 6 feet onto concrete, it’s waterproof and dustproof. Oh, and it’s resistant to oils and chemicals, can withstand extreme temperature changes, can survive extreme vibrations, and a lot more. The fact is that the S31 isn’t your average smartphone.

If you try hard enough, you could probably break the S31. That’s the key, though, you’d need to try hard. In normal use, it will survive just about anything bar a freak accident.

Cat S31 Display and Cameras

It’s sometimes the case that rugged phones, and smartphones, in particular, compromise on the individual components in the phone. The S31, though, does none of that. The display, for example is 4.7″, with a 720 x 1280px HD resolution. With screens of this size, an HD resolution is perfectly sufficient, so there’s no need to add cost with unnecessarily high-resolution displays.

The display quality is excellent, even in bright conditions, and has a crispness that is sometimes lacking at this level.

The rear camera is 8MP, with autofocus and LED flash. It can record video at 720HD resolution, and the still camera has geotagging, touch-to-focus, and face recognition. The front camera is 2MP and can also record video.


As you’d expect for a smartphone that tries to go the extra mile, 4G compatibility is present. This gives the maximum data transfer speeds when using mobile data. Wi-fi 802.11 b/g/n brings the same opportunity with broadband connections and Bluetooth means easy conne3ction to handsfree systems and accessories.

GPS with GLONASS is present, which means greatly increased accuracy for navigation and location services. Cat has also been good enough to put in an FM Radio, which is useful if you have no data or wifi connection and need to keep up to date with news etc.

Cat S31 Power

The 1.3GHz quad-core processor carries plenty of power to drive the S31 easily. That, though, is only part of the job. If you don’t have the battery power to keep you going, then the phone can be as fast as lightning and it would be irrelevant. It’s as well, then, that a 4000 mAh battery will keep you talking for 30 hrs or on standby for 38 days.

If you have the type of job where a tough phone is a necessity, rather than a simple choice, knowing you have the power to get through the day is vital.

There is 16GB of internal storage, to which another 128GB can be added via the MicroSD card slot.

Running Android also lifts the Cat S31 out of the increasing numbers of rugged phones which run their own operating systems. It means the S31 is as good at home as it is at work. This flexibility greatly increases the overall level of appeal.


The close relative of the S31, the S30, is also a great option for a rugged phone. The S31, though, takes the performance level just that bit higher. If you like to push your smartphone to extremes at work and play, the S31 is a great all-around choice.

Additional Information

Weight0.44 lbs
Dimensions5.75 × 2.93 × 0.50 in

Carrier Branding


, ,

Model Number


Phone Style



Android Operating System

Internal Memory

16 GB

MicroSD Card Slot

Battery Power

Charging Port Type

Micro USB

Fast Charging



Fingerprint Sensor


Screen Size

Resolution Size

Rugged Level

Gorilla Glass, IP68 compliant, MIL-810G

Front Camera Resolution

2 MP

Rear Camera Resolution

8 MP

2G Bands/Frequencies

B2 (1900), B3 (1800), B5 (850), B8 (900)

3G Bands/Frequencies

B1 (2100), B2 (1900 PCS), B4 (1700/2100 AWS 1), B5 (850), B8 (900)

4G LTE Bands/Frequencies

B12 (700 ac), B17 (700 bc), B2 (1900 PCS), B4 (1700/2100 AWS 1), B5 (850), B7 (2600)

Supports Carrier Bands

AT&T up to 4G LTE, Metro-PCS up to 4G LTE, T-Mobile up to 4G LTE

Removable Battery



Brand New

Unlocked Status


Return Policy

All of the items on the Mr Aberthon website are completely covered by our 14-day return policy.

If you choose to return your device, you will receive the full refund. Mr Aberthon does not charge any additional restocking or handling fees. In order to qualify for the return policy, the product ID number will have to match the number on the device that we sent out (to protect us against scammers and fraud) and the device will need to still be in mint condition.

Shipping Options

Mr Aberthon has three shipping options:

  • 4-5 day shipping (Free throughout the USA)
  • 2-3 business day shipping
  • Overnight shipping (for orders that are purchased before 2pm EST)

Please note that we will only enable overnight shipping if we have the ability at that moment to fulfill the overnight shipping.

Shipping to Canada

We are proud to offer shipping to Canada. Here are the costs:

  • 4-7 business days for $40
  • 2-3 business days for $80

Extra costs may occur for the customer due to duty and taxes.

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