---
product_id: 725635542
title: "Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM"
brand: "unihertz"
price: "€ 188.87"
currency: EUR
in_stock: true
reviews_count: 13
category: "Unihertz"
url: https://www.desertcart.de/products/725635542-unihertz-atom-worlds-smallest-4g-toughness-smartphone-android-8-1
store_origin: DE
region: Germany
---

# IP68 waterproof, dustproof & shockproof World's smallest 4G rugged smartphone Fingerprint authentication for privacy Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM

**Brand:** unihertz
**Price:** € 188.87
**Availability:** ✅ In Stock

## Summary

> 🌍 Tiny Titan: The toughest 4G smartphone that fits your lifestyle and pocket!

## Quick Answers

- **What is this?** Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM by unihertz
- **How much does it cost?** € 188.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/725635542-unihertz-atom-worlds-smallest-4g-toughness-smartphone-android-8-1)

## Best For

- unihertz enthusiasts

## Why This Product

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

## Key Features

- • **Rugged & Ready:** IP68 certified waterproof, dustproof, and shockproof for fearless outdoor use.
- • **Secure & Private:** Fingerprint recognition ensures your data and calls stay locked down.
- • **Smooth Multitasking:** Octa-core 2 GHz processor paired with 4GB RAM for seamless performance.
- • **Adventure-Ready Battery:** 2,000mAh battery delivers all-day reliability on the go.
- • **Pocket-Sized Powerhouse:** Unmatched compactness with a 2.4-inch display that fits anywhere.

## Overview

The Unihertz Atom is the world's smallest 4G rugged smartphone, featuring a compact 2.4-inch display, IP68 waterproof and shockproof certification, and a powerful octa-core 2 GHz processor with 4GB RAM. It runs Android 9.0, offers 64GB storage, dual cameras (16MP rear, 8MP front), fingerprint security, NFC, and a 2,000mAh battery designed for all-day outdoor use. Perfect for professionals who demand durability and portability without compromise.

## Description

desertcart.co.jp: Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM : Electronics

Review: そもそも携帯依存ではないので、LINEと通話ができ胸ポケットに収まるものを探していました。 私の要望を全て叶えてくれて、携帯としてもなんの不自由もなくちゃんと使えます。画面が小さいため文字打ちには慣れが必要ですが5年使用して大満足です。 不満点の唯一は交換用バッテリーが販売していないので、バッテリーが劣化したら買い替えしか手段がないこと。ですが今でも一日一回のフル充電でなんとかなっているので、私にとっては最適解な製品です。
Review: Rugged phone. - Best rugged phone for outdoor lifestyle. However, checking cellular compatibility and customs procedures in your country prior to placing order are recommended.

## Features

- World's smallest 4G toughness smartphone with IP68 waterproof certification, octa-core processor and operates on Android 8.1 Oreo.
- Universal 4G Band 8M+ 16M pixels dual camera with 64GB storage, fingerprint authentication and NFC function.
- 2,000mAh large capacity battery, IP68 certified battery that is sufficient for traveling, outdoor 4G toughness smartphone with waterproof, dustproof and shockproof function, making it a perfect smartphone for outdoor adventures, business travel and daily life.
- Fingerprint recognition increases your privacy.Plus, you can unlock your important calls or capture precious moments with fingerprint recognition.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KP8J8YN |
| Additional Features | GPS。, USB。, wifi, カメラ, ラジオ |
| Amazon Bestseller | #57,025 in Electronics ( See Top 100 in Electronics ) #459 in Smartphones |
| Aspect Ratio | 1.77:1 |
| Average Battery Life Talk Time | 6 Hours |
| Battery Average Life | 8 Hours |
| Battery Capacity | 2000 Milliamp Hours |
| Battery Charge Time | 100 minutes |
| Battery Description | Lithium-Ion |
| Battery Power | 2000 |
| Biometric Security Feature | Fingerprint Recognition |
| Brand | Unihertz |
| Built-In Media | SIMトレイエジェクター, USBケーブル, スクリーンプロテクター |
| CPU Model | Atom |
| CPU Speed | 2 GHz |
| Camera Description | Front, Rear |
| Camera Flash | フラッシュなし |
| Cellular Technology | 2G, 3G, 4G |
| Color | Black |
| Compatible Devices | [MAJOR_US_CARRIERS] |
| Connectivity Technology | USB |
| Connector Type | USB Type-C |
| Customer Reviews | 4.0 out of 5 stars 1,261 Your Review |
| Display Pixel Density | 315 Pixels Per Inch (PPI) |
| Display Resolution Maximum | 240 x 432 |
| Display Type | LCD |
| Effective Video Resolution | 8 Pixels |
| Flash Memory Supported Size Maximum | 64 GB |
| Form Factor | Smartphone |
| Frame Rate | 30 fps |
| Front Photo Sensor Resolution | 8 MP |
| GPS Geotagging Functionality | True |
| Headphones Jack | 3.5 mm |
| Human-Interface Input | Touchscreen |
| Item Dimensions | 9.7 x 4.5 x 1.9 cm |
| Item Height | 18.8 mm |
| Item Weight | 108 Grams |
| Manufacturer | ATOM-01 |
| Memory Storage Capacity | 64 GB |
| Model Series | Atom |
| Model Year | 2017 |
| Number of Front Cameras | 1 |
| Number of Rear Facing Cameras | 1 |
| Operating System | Android 9.0 |
| Optical Sensor Resolution | 16 MP |
| Phone Talk Time | 6 Hours |
| Processor Series | Atom |
| Processor Speed | 2 GHz |
| RAM Memory Installed | 4 GB |
| Ram Memory Installed Size | 4 GB |
| Rear Facing Camera Photo Sensor Resolution | 16 MP |
| Refresh Rate | 120. |
| Resolution | 240*432 |
| SIM Card Slot Count | Dual SIM |
| Screen Size | 2.4 Inches |
| Shooting Modes | Automatic |
| Specific Uses For Product | Outdoor adventure, rugged environment, hiking, camping, water sports, construction site, industrial facilities |
| Supported Satellite Navigation System | GPS |
| Video Capture Resolution | 1080p |
| Water Resistance Level | Waterproof |
| Wireless Network Technology | LTE, Wi-Fi |
| Wireless Provider | T-Mobile, Unlocked, Verizon |

## Product Details

- **Brand:** Unihertz
- **CPU Model:** Atom
- **CPU Speed:** 2 GHz
- **Operating System:** Android 9.0
- **Ram Memory Installed Size:** 4 GB

## Images

![Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM - Image 1](https://m.media-amazon.com/images/I/61wjwl-PvUL.jpg)
![Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM - Image 2](https://m.media-amazon.com/images/I/51cYZUN+dRL.jpg)
![Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM - Image 3](https://m.media-amazon.com/images/I/71BmAI1wvUL.jpg)
![Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM - Image 4](https://m.media-amazon.com/images/I/51LG0O5iq3L.jpg)
![Unihertz Atom, World's Smallest 4G Toughness Smartphone, Android 8.1 Oreo, Sim-Free, 4GB RAM & 64GB ROM - Image 5](https://m.media-amazon.com/images/I/515QAUgEeJL.jpg)

## Questions & Answers

**Q: Can I use this phone with my Verizon account?**
A: Yes you can, but you may have to go into the phone and enable the cellular data option. Mine was disabled right out of the box, I took it in to a Verizon store and the guy made it work. Verizon does not list it as a supported phone, but if you already have an active Verizon sim, it should work.

**Q: Can you display the small screen on a large screen like a tv using usb c to a hdmi adapter cable?**
A: No but if you get a chrome cast or a smart tv you can cast YouTube and other media services

**Q: So this phone allows for 2 sim cards from different carriers? How does it know which one to use?**
A: You can select which SIM card to use by default for Cellular Data, Voice, and Text.  For the Cellular Data one, you set it and don't really change it unless you wanted to.  For Voice, I have mine set to prompt me every time I make a call.  I tried that with Text, but with the Google Messages app, it would throw an error stating no default SIM selected.  I selected one as the default and from there, any time I create a new message OR reply to an existing thread, there's a button to allow you to switch between the two different SIM cards.

It defaults to SIM1 & SIM2, but I renamed them to "AT&T" and "T-Mobile", and even color coded them to Blue & Pink, respectively.  During normal operation, the phone is connected to both networks to send & receive calls or texts at any given time, but you'll notice only one will show the "4G" logo to indicate mobile data for that SIM card in the status bar.  The other will show signal strength, but with an "X", indicating it's not connected to cellular/mobile data.

When the phone rings, the call screen is color coded to match the SIM cards since I customized them, so it's easy to determine which SIM card is receiving the call.  When making a call, it prompts me which one to use, along with the names & color codes.

When receiving text messages, it will say "via AT&T" or "via T-Mobile" below the text itself in the Message app to indicate the SIM card receiving the text.  The Messages app will even say "Text message from " and then the SIM card you've selected to text from, and also displays a color-coded SIM card icon with the SIM card number inside the icon (1 or 2).  Tapping that icon brings up the menu to choose which SIM card to send from, which, again, is color coded & has the labels I chose.

I haven't yet found an easy way to toggle the cellular/mobile data between the SIM cards, aside from just going to settings and telling it to switch.

Overall, I'm really happy with how well it handles the different SIM cards, and switching between the two for Voice & Texts is very intuitive.

**Q: Will this phone do voice to text?**
A: Yes.  With the google gboard, there's a mic button you can tap to activate voice to text. You can also use the Google Assistant app for texting, or Android Auto for hands-free driving.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on October 12, 2025*

そもそも携帯依存ではないので、LINEと通話ができ胸ポケットに収まるものを探していました。 私の要望を全て叶えてくれて、携帯としてもなんの不自由もなくちゃんと使えます。画面が小さいため文字打ちには慣れが必要ですが5年使用して大満足です。 不満点の唯一は交換用バッテリーが販売していないので、バッテリーが劣化したら買い替えしか手段がないこと。ですが今でも一日一回のフル充電でなんとかなっているので、私にとっては最適解な製品です。

### ⭐⭐⭐⭐⭐ Rugged phone.
*by D***S on January 28, 2026*

Best rugged phone for outdoor lifestyle. However, checking cellular compatibility and customs procedures in your country prior to placing order are recommended.

### ⭐⭐⭐⭐ Review
*by あ***か on August 31, 2019*

UQmobileのSIMカードで使用しています。 見せた人には必ず「それ、なに？？笑」と言われます。 画面がとにかく小さい！誤入力は日常茶飯事です。 自分は日本語はフリック、英字はケータイ打ちをしていますが、バックスペースで文字を消すつもりが予測変換を連打して謎の文章を打ち込んでいることも・・・ LINEやメールのやりとりを頻繁にする人には厳しいと思います。 タブレットやキーボード等なにかと併用して使うのがおすすめ。 小ささと頑丈さが本当に魅力的。（お値段も。） その分、コロッと丸めで重いですが、そこがまたいい。 Androidバージョンも9に更新されました。 画面も明るいし綺麗です。カメラもまあまあ。 出先では通知の確認、カレンダー、時計、通話、ネット、音楽再生ができれば十分なので、私は大満足です。 誰も知らない誰も持っていないユニークなガジェットにワクワクできる方は、ぜひ。

## Frequently Bought Together

- Unihertz Atom - The World's Smallest 4G Rugged Smartphone with Android 9.0 Pie, Unlocked, 4GB RAM, and 64GB ROM (T-Mobile & Verizon Support)
- (2 Pack) Authentic Official T-Mobile SIM Card Micro/Nano/Standard GSM 4G/3G/2G LTE Prepaid/Postpaid Starter Kit Unactivated Talk Text Data & Hotspot

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---

*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-22*