---
product_id: 81025311
title: "Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More"
brand: "cat"
price: "€ 185.78"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.nl/products/81025311-caterpillar-cat-b35-unlocked-mobile-phone-black-rugged-waterproof-4g
store_origin: NL
region: Netherlands
---

# IP68 waterproof & dustproof 4G LTE dual SIM connectivity 30 days standby battery Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More

**Brand:** cat
**Price:** € 185.78
**Availability:** ✅ In Stock

## Summary

> 🔧 Tough Tech for the Modern Trailblazer

## Quick Answers

- **What is this?** Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More by cat
- **How much does it cost?** € 185.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/81025311-caterpillar-cat-b35-unlocked-mobile-phone-black-rugged-waterproof-4g)

## Best For

- cat enthusiasts

## Why This Product

- Trusted cat brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Global 4G Connectivity:** Unlocked dual SIM with 4G LTE ensures seamless worldwide coverage wherever your work or play takes you.
- • **Essential Smart Features:** WhatsApp, Google Maps, and Google Assistant onboard—smart enough to keep you connected without the distractions.
- • **Unstoppable Battery Life:** Stay unplugged for up to 30 days on standby—power that keeps pace with your busy lifestyle.
- • **Compact & Functional Design:** 2.4-inch screen with tactile buttons and a built-in flashlight—perfect for professionals who value durability and simplicity.
- • **Rugged & Ready for Anything:** IP68 certified waterproof, dustproof, and drop-proof up to 1.8m—built to survive your toughest adventures.

## Overview

The Caterpillar CAT B35 is a rugged, IP68-rated 4G feature phone designed for professionals who demand durability and long battery life. With up to 30 days standby, dual SIM support, and essential smart apps like WhatsApp and Google Maps, it offers reliable global connectivity in a compact, drop-proof form factor. Ideal for those seeking a robust device that balances functionality with a smartphone detox.

## Description

This rugged 4G IP68 phone is designed to keep you connected for longer with a reliable battery. The Cat B35 is robust and tough, and has been tested in extreme conditions. It is waterproof to 1.2m for 35 minutes, drop proof up to 1.8m to concrete, dustproof and resistant to extreme temperatures.

Review: Great smartphone detox - I looked around at various phones that would enable me to detox from the ridiculous amount of screen time I was racking up on my smartphone (Google Pixel 3aXL). I considered options from Nokia and others, and reviews seemed to be a mixed bag (as they do for this to be fair). I thought I'd give the B35 a go. I didn't want to spend more than £100 and at £85 this seemed pretty good value. Ordered on a Monday for free delivery by Thursday, and it arrived early on the Wednesday which was an exciting surprise. Out of the box the phone seems pretty well made. The outer shell is a sort of rubberised plastic (which I've since noticed does seem to attract smudges but most phones do) and a nice overall design to my eye. A case of form follows function methinks, which is quite appropriate given the CAT branding. Size wise it seems small, but a phone of this type would do coming from a large smartphone like the 3aXL. I've added a photo of it next to a tin of Pepsi for reference. I'd be happy to chuck this in the bottom of a rucksack / go camping with the kids etc - it just seems more rugged than my smartphone. On start up the phone displays the CAT logo and you hear the sound of a CAT engine starting up. My 3 boys think this is amazing and that I'm really cool, but it's grating on me already and I can't see a way to disable it in the menu. It's not a big problem - I just usually use the light of my phone screen to make my way to bed without putting the light on to wake my wife, and then turn it off - and I don't think she wants to hear the sound of a CAT C-11 engine at 1am. I wasn't sure from the advert and ordered a nano-sim adapter but this was a horrible waste of £2.49 - the phone had one already in the slot. It connected to WIFI easily, and recognised the EE network with no issues. The OS is pretty intuitive, and once muscle memory has kicked in for thumb texting with predictive text, it's a pretty smooth process to operate. WhatsApp works with no issues - although no video calling which I was aware of. For me, WhatsApp was a must have and the fact that is works so well on this is great. I tried to get my Apple @me.com email added to the native email app on the phone, but no luck. I'm not certain this is the phones fault, as I've struggled to get it working on other non-Apple devices too. I set up another free email address and it worked fine. I transferred my contacts seamlessly in 2 minutes via bluetooth which never happens to me - it always takes 4 hours. From the home screen you hit the left arrow to see 4 'quick access' apps. These are the KaiOS store, google assistant, google maps and Youtube. I can't see an option to change these which is slightly frustrating. I'd prefer WhatsApp & messages to live there (I've no interest in using youtube on the phone - which was a good part of my motivation to ditch the smartphone). That being said, there is a dedicated 'notices' shortcut from the home screen which shows any WhatsApp notifications / emails etc and this seems to work very well. What else can I say? There's really not a lot to it. It is what it is. Here's a summary of my Pros and Cons PROS 1) It works 2) It's not a smartphone 3) It's not a "dumbphone" either (eg Youtube, Google Asst etc) 4) Decent battery life (also because you have less reason to use it. I'm 2 full days from a 100% battery and now on 73% so seems like it could last a week no problem) 5) Good option for a smartphone detox 6) Not that expensive 7) Intuitive OS 8) You will feel very nostalgic depending on your age 9) You will not be harangued by notifications every 14 seconds 10) Seems rugged 11) If a survival situation necessitated you sending a WhatApp message while underwater, you could do it CONS 1) Older style screen means you need to be looking straight on to get the best viewing angle. No big deal really 2) It makes excavator noises on start up and shut down 3) Not able to select your apps for the home screen 'dock' 4) If you are a chatty Cathy on the keyboard, you might find this frustrating even with predictive text. However if you're not, you now have an excuse for your one word answers Can't think of anything else. Don't buy it if you are intending to sit and watch YT etc Do buy it if you want a basic feature phone, that's still 4G and has WhatApp - as well as Google Maps etc to get you out of a pickle. I'm keeping my smartphone just in case but looking good so far.
Review: A drop-proof, waterproof, 4G feature phone. - The phone won't appeal to everyone: it's got a small screen (non-touchscreen, of course) and the KaiOS app store is stocked with a few primitive games and a few utilities that no-one will ever use. And the camera is bad. But what this phone does have going for it might appeal: it's waterproof and drop-proof, with a battery life of days, and can create a 4G hotspot. The Google Maps app won't do navigation, but it will do directions. And the Google Assistant - well, I don't know what use I'll find for that - but it's there. It also - depending on the model variant - supports dual SIMs or one SIM and a Micro SD card. And it has a built-in torch and FM radio. If you wanted a cheapish feature phone and were thinking of getting a Nokia 8110 'banana phone': don't. At least not until you've considered this one. You drop your banana phone in the bath and it's done for. You drop the CAT B35 in the bath, it'll go for a swim and refuse to come out because it's having so much fun. Although why are you taking the phone in the bath anyway?

## Features

- 2.4 inch TFT screen
- Long battery life up to 30 days standby
- Very resistant to water, drops and dust (IP68)
- WiFi and 4G connection, with Dual Sim and microSD slot
- 2MP camera, Bluetooth, flashlight and FM radio

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07H171P7B |
| Aspect Ratio | 5:4 |
| Battery Average Life | 30 days |
| Battery Average Life Talk Time | 720 Minutes |
| Battery Capacity | 2300 Milliamp Hours |
| Battery Description | Lithium Ion |
| Battery Power | 4000 Milliamp Hours |
| Best Sellers Rank | 79,627 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3,021 in SIM-Free & Unlocked Mobile Phones |
| Biometric Security Feature | Voice Recognition |
| Box Contents | Adapter |
| Brand | CAT |
| Brand Name | CAT |
| CPU model | A-Series |
| CPU speed | 1.3 GHz |
| Camera Description | Rear |
| Camera Flash Type | LED |
| Cellular Technology | 2G, 4G, Edge, GPRS, UMTS |
| Colour | Black |
| Compatible Devices | [PARTIAL] |
| Connector Type | Micro USB |
| Customer Reviews | 3.7 out of 5 stars 447 Reviews |
| Effective Video Resolution | 8 Pixels |
| Flash Memory Supported Size Maximum | 4000 MB |
| Form Factor | Bar |
| Frame Rate | 30 |
| Front Photo Sensor Resolution | 2 MP |
| GPS Geotagging Functionality | True |
| Headphones Jack | [Unknown] |
| Human Interface Types | Buttons |
| Item Dimensions | 13.8 x 6 x 1.4 centimetres |
| Item Weight | 8.82 Ounces |
| Item height | 13.9 millimetres |
| Manufacturer | CAT |
| Material Features | Robust and resistant to sands, dust, and dirt |
| Maximum Display Resolution | 144 x 180 |
| Memory Storage Capacity | 512 GB |
| Memory storage capacity | 512 GB |
| Model Series | B35 |
| Model Year | 2019 |
| Network Connectivity Technology | 4G |
| Number of Front Cameras | 1 |
| Number of Rear Facing Cameras | 1 |
| Operating System | Android 10.0 |
| Operating system | Android 10.0 |
| Optical Sensor Resolution | 2 MP |
| Phone Talk Time | 720 Minutes |
| Processor Series | A-Series |
| Processor Speed | 1.3 GHz |
| Product Features | Rugged Body, Water Resistant |
| RAM Memory Installed | 512 MB |
| RAM memory installed size | 512 MB |
| Rear Facing Camera Photo Sensor Resolution | 2 MP |
| Resolution | 240 x 400 |
| SIM Card Slot Count | Dual SIM |
| Screen Size | 2.4 Inches |
| Shooting Modes | Automatic |
| Sim Card Size | Nano |
| Specific Uses For Product | activities in harsh environments |
| Unit Count | 1.0 Count |
| Video Capture Resolution | 1080p |
| Water Resistance Level | Waterproof |
| Wireless Network Technology | Wi-Fi |
| Wireless Provider | Unlocked |

## Product Details

- **Brand:** CAT
- **CPU model:** A-Series
- **CPU speed:** 1.3 GHz
- **Memory storage capacity:** 512 GB
- **Model name:** B35
- **Operating system:** Android 10.0
- **RAM memory installed size:** 512 MB
- **Resolution:** 240 x 400
- **Screen size:** 2.4 Inches
- **Wireless carrier:** Unlocked

## Images

![Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More - Image 1](https://m.media-amazon.com/images/I/213IOLrEQrL.jpg)
![Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More - Image 2](https://m.media-amazon.com/images/I/21Ln+UbS16L.jpg)
![Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More - Image 3](https://m.media-amazon.com/images/I/41hxP46+NRL.jpg)
![Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More - Image 4](https://m.media-amazon.com/images/I/41onl+IgscL.jpg)
![Caterpillar CAT B35 Unlocked Mobile Phone (Black). Rugged, Waterproof, 4G/LTE Handset. Will Work with any Sim Card Worldwide. Camera, WiFi, GPS, 4G and More - Image 5](https://m.media-amazon.com/images/I/5118To8oxZL.jpg)

## Questions & Answers

**Q: Does this phone run on the gsm network, and will it work in the us?**
A: Hi, this device will run on GSM both for the primary and secondary SIM.  The device has two modems (2 IMEIs) with the primary SIM connected to a modem that supports 4G, 3G & 2G. The secondary SIM connects to a modem that only uses GSM.
The GSM support is for the following frequency bands: 2, 3, 5, 8 equating to 850/900/1800/1900 mhz.  From what I can gather, the US typically uses 850 & 1900 for GSM so the answer to your question should be yes... however I would suspect it may be situational based on your geolocation coverage and the network you are trying to attach to.  The primary SIM will, I suspect, always favour 4G above 3G or 2G so unless your subscription is only offers 2G, then you will spend little time on it on the primary SIM.  I also recall reading that the primary modem will, if the subscription / network offer it, support Voice over Wifi/Voice over 4G (VoWifi & VoLTE).
Worth noting that with the rollout of 4G and the commencement of 5G rollouts, the US carriers are favouring sunsetting their 2G networks so something to be mindful of.
Hope this answer is useful :-)

**Q: can you put a lanyard on any of the caterpillar phones**
A: On the second picture in this listing, there’s a small square visible towards the bottom right of the back of the phone. This is the lanyard hole on my B35.

**Q: What is the sound quality like for actually speaking to people?**
A: Sound quality Good,  it’s not a touch screen though therefore it’s not very good if you want to access the internet. The phone is very robust that is the main reason for purchase.

**Q: Can you check email on this phone?**
A: I believe so but the phone is not great, mine going back for repairs after only 6 months

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great smartphone detox
*by N***Y on 8 July 2021*

I looked around at various phones that would enable me to detox from the ridiculous amount of screen time I was racking up on my smartphone (Google Pixel 3aXL). I considered options from Nokia and others, and reviews seemed to be a mixed bag (as they do for this to be fair). I thought I'd give the B35 a go. I didn't want to spend more than £100 and at £85 this seemed pretty good value. Ordered on a Monday for free delivery by Thursday, and it arrived early on the Wednesday which was an exciting surprise. Out of the box the phone seems pretty well made. The outer shell is a sort of rubberised plastic (which I've since noticed does seem to attract smudges but most phones do) and a nice overall design to my eye. A case of form follows function methinks, which is quite appropriate given the CAT branding. Size wise it seems small, but a phone of this type would do coming from a large smartphone like the 3aXL. I've added a photo of it next to a tin of Pepsi for reference. I'd be happy to chuck this in the bottom of a rucksack / go camping with the kids etc - it just seems more rugged than my smartphone. On start up the phone displays the CAT logo and you hear the sound of a CAT engine starting up. My 3 boys think this is amazing and that I'm really cool, but it's grating on me already and I can't see a way to disable it in the menu. It's not a big problem - I just usually use the light of my phone screen to make my way to bed without putting the light on to wake my wife, and then turn it off - and I don't think she wants to hear the sound of a CAT C-11 engine at 1am. I wasn't sure from the advert and ordered a nano-sim adapter but this was a horrible waste of £2.49 - the phone had one already in the slot. It connected to WIFI easily, and recognised the EE network with no issues. The OS is pretty intuitive, and once muscle memory has kicked in for thumb texting with predictive text, it's a pretty smooth process to operate. WhatsApp works with no issues - although no video calling which I was aware of. For me, WhatsApp was a must have and the fact that is works so well on this is great. I tried to get my Apple @me.com email added to the native email app on the phone, but no luck. I'm not certain this is the phones fault, as I've struggled to get it working on other non-Apple devices too. I set up another free email address and it worked fine. I transferred my contacts seamlessly in 2 minutes via bluetooth which never happens to me - it always takes 4 hours. From the home screen you hit the left arrow to see 4 'quick access' apps. These are the KaiOS store, google assistant, google maps and Youtube. I can't see an option to change these which is slightly frustrating. I'd prefer WhatsApp & messages to live there (I've no interest in using youtube on the phone - which was a good part of my motivation to ditch the smartphone). That being said, there is a dedicated 'notices' shortcut from the home screen which shows any WhatsApp notifications / emails etc and this seems to work very well. What else can I say? There's really not a lot to it. It is what it is. Here's a summary of my Pros and Cons PROS 1) It works 2) It's not a smartphone 3) It's not a "dumbphone" either (eg Youtube, Google Asst etc) 4) Decent battery life (also because you have less reason to use it. I'm 2 full days from a 100% battery and now on 73% so seems like it could last a week no problem) 5) Good option for a smartphone detox 6) Not that expensive 7) Intuitive OS 8) You will feel very nostalgic depending on your age 9) You will not be harangued by notifications every 14 seconds 10) Seems rugged 11) If a survival situation necessitated you sending a WhatApp message while underwater, you could do it CONS 1) Older style screen means you need to be looking straight on to get the best viewing angle. No big deal really 2) It makes excavator noises on start up and shut down 3) Not able to select your apps for the home screen 'dock' 4) If you are a chatty Cathy on the keyboard, you might find this frustrating even with predictive text. However if you're not, you now have an excuse for your one word answers Can't think of anything else. Don't buy it if you are intending to sit and watch YT etc Do buy it if you want a basic feature phone, that's still 4G and has WhatApp - as well as Google Maps etc to get you out of a pickle. I'm keeping my smartphone just in case but looking good so far.

### ⭐⭐⭐⭐ A drop-proof, waterproof, 4G feature phone.
*by B***H on 5 December 2018*

The phone won't appeal to everyone: it's got a small screen (non-touchscreen, of course) and the KaiOS app store is stocked with a few primitive games and a few utilities that no-one will ever use. And the camera is bad. But what this phone does have going for it might appeal: it's waterproof and drop-proof, with a battery life of days, and can create a 4G hotspot. The Google Maps app won't do navigation, but it will do directions. And the Google Assistant - well, I don't know what use I'll find for that - but it's there. It also - depending on the model variant - supports dual SIMs or one SIM and a Micro SD card. And it has a built-in torch and FM radio. If you wanted a cheapish feature phone and were thinking of getting a Nokia 8110 'banana phone': don't. At least not until you've considered this one. You drop your banana phone in the bath and it's done for. You drop the CAT B35 in the bath, it'll go for a swim and refuse to come out because it's having so much fun. Although why are you taking the phone in the bath anyway?

### ⭐ Keypad not working after a few months, pathetically slow and unresponsive
*by D***L on 13 December 2021*

Keypad malfunctions often so sometimes a key doesn't respond sometimes it doubles or triples this makes typing a nightmare. It takes a good few seconds to load basic screens like calls and contacts. It randomly restarts itself sometimes at bery inconvenient times and them you just gotta wait a long time until its up and running again. Battery life is good. Connectivity is good. Complex apps like maps and browser are way too slow. I would love to contact support to ask for a replacement with a working keypad but they only have a call back option. No way for me to contact them. Any advice would be appreciated

## Frequently Bought Together

- Caterpillar CAT B35 - Mobile Phone 4GB, 512MB RAM, Dual Sim, Black
- Caterpillar CAT S42 H+, Dual, 32GB 3GB, Black

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-26*