CAT S31s
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The CAT S31s is a rugged smartphone built for tough environments. Choosing a pre-owned model often saves money and reduces waste. You can compare offers from several online stores and marketplaces on Relovie to find the best balance of condition and price while keeping original retail price in mind.
Explore similar phones in our telephones category: Telephones
Why buy a pre-owned CAT S31s? 🔁
- Lower price than new while keeping rugged durability.
- Faster purchase path: compare listings across multiple sites in one place.
- Good option for hands-on jobs, outdoor hobbies, or as a solid backup phone.
What makes the CAT S31s special? 🔧
Launched in 2018, the CAT S31s stands out for its focus on durability and reliable day to day performance. It prioritises toughness over flagship specs, making it a practical choice for customers who need a phone that keeps working when conditions are rough.
- Rugged construction — built to resist drops and shocks, useful on building sites and outdoors.
- Water and dust protection — designed for wet and dusty environments.
- Long battery life — built to last through long shifts or remote trips.
- Simple, durable screen — more scratch resistant than typical consumer phones.
- Practical connectivity — covers essential mobile features for calls, maps, and basic apps.
Same series comparison 📊
The CAT S31s is part of the CAT S series. Other models include CAT S42, CAT S52, CAT S61, and CAT S75. Use filters for RAM, storage, price, condition, and colour to narrow results.
| Model | Best for | Why choose |
|---|---|---|
| CAT S31s | Basic rugged daily use | Durable, reliable battery and simple features at a lower price point |
| CAT S42 | Balanced rugged performance | Updated design and improved ergonomics |
| CAT S52 | Compact rugged smartphone | Slimmer profile with good durability for everyday carry |
| CAT S61 | Worksite tools and sensors | Extra sensors and thermal camera for specialised use |
| CAT S75 | Top-level rugged performance | Highest durability standards for the most demanding jobs |
Things to consider when choosing a pre-owned CAT S31s ⚠️
- Condition grade — pick the condition level that fits your comfort with cosmetic wear.
- Battery capacity — older phones may have reduced battery life; compare seller specs.
- Accessories included — note if charger or original packaging is part of the offer.
- Software and connectivity — check which mobile networks and Android version are supported.
- Colour options — listings may include black and high-visibility yellow variants.
- Price filter — use Relovie filters to set a price range and find value within your budget.
Questions and answers
Is the CAT S31s waterproof?
Most S31s models offer water and dust protection suited to everyday wet conditions. Check individual listings for the seller's stated rating and details.
Will it work on modern mobile networks?
Compatibility varies by model and region. Review the network bands and carrier compatibility on the seller's site after you click through.
How does the CAT S31s compare to the S52?
The S31s focuses on rugged reliability and value. The S52 is usually slimmer and may offer more modern ergonomics. Use the series comparison table and filters to find the right fit.
What warranty or return options are available?
Warranty and returns depend on the selling site. Click through to each listing for exact seller policies and any available guarantees.
There are currently available pre-owned products priced between and . Use the price filter and condition filters to find the best match for your needs.
Find and buy CAT S31s via Relovie – the largest collection of pre-owned and refurbished electronics online.