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Hammer BS21

Hammer BS21
Brand: Hammer
Category: Rugged Smartphone
  • Display: 5.0-inch TFT screen
  • Camera: 8MP rear / 5MP front
  • Memory: 2GB RAM / 16GB ROM
  • Platform: MT6739 CPU / Android 8.1
  • Battery: 5000mAh
  • Ruggedity: IP69 / MIL-STD-810G

Our Rating

Disclaimer: We can not guarantee 100% accuracy.

  • Overall Average 7 / 10

he Hammer BS21 is a rugged smartphone designed to withstand tough conditions. It boasts an impressive array of durability certifications including IP68 for dust and water resistance, MIL-STD-810G for shock resistance, and IK07 for impact resistance up to 1.5 meters on concrete. Despite its tough exterior, the phone maintains a comfortable size at 156.5 x 77.2 x 17.8 mm, though it’s a bit heavier at 300 grams.

The BS21 features a 5.0-inch TFT LCD touchscreen display with a resolution of 720 x 1280 pixels and a 16:9 aspect ratio. The display is protected by Corning Gorilla Glass 3 for added scratch resistance.

The phone runs on Google Android 8.1 (Oreo) and is powered by a MediaTek MT6739 quad-core processor with 1.5GHz Cortex-A53 cores and PowerVR GE8100 GPU. It comes with 2GB of RAM and 16GB of internal storage, expandable via a microSD card (uses SIM 2 slot).

For photography, the BS21 features an 8MP single rear camera with Phase-Detection Autofocus (PDAF) for capturing clear photos. There’s also a 5MP front-facing camera for selfies and video calls, although it lacks an LED flash. The rear camera can record videos in 1080p resolution at 30 frames per second, and an LED flash is available for low-light situations.

Connectivity options are extensive, including NFC for contactless payments, Bluetooth 4.2 for headsets, WiFi for internet access, FM radio for entertainment, and a USB Type-C port for faster charging and data transfer. The BS21 also supports navigation using A-GPS, GLONASS, and BeiDou satellite systems.

The built-in sensors include an accelerometer, gyroscope, proximity sensor, compass, and barometer for various functionalities and fitness tracking. A 5000mAh Li-Po battery provides ample power for extended use, and it’s non-removable.

The Hammer BS21 comes in two color options: black and orange. The table below contains the full specifications of the device.

Full Specifications


Launch This refers to the date when this device was officially introduced into the market. Announced 2021, April / Released 2021, May
Brand / Model These are key identifiers that indicate the manufacturer or company that produces this smartphone, and the specific model of the phone. Hammer / BS21

Network Technology

2G Bands 2G refers to the second generation of cellular technology and includes various frequency bands for basic voice and text communication. 850 / 900 / 1800 / 1900 - SIM 1 and SIM 2
- CDMA 800 / 1900
3G Bands 3G refers to the third generation of cellular technology, encompassing different frequency ranges for faster data speeds, mobile internet, and multimedia capabilities. 3G Bands 850 / 900 / 1900 / 2100
4G Bands 4G refers to the fourth generation of cellular technology, operating in specific frequency bands to provide significantly faster data speeds, supporting high-definition video streaming and advanced applications. 4G Bands


Ruggedity This indicates the device's durability and ability to withstand harsh conditions or impacts. It is a very popular term used with tough or rugged phones. IP68/IP69K are international ratings that measure a smartphone's resistance to dust and water. MIL-STD-810H is a military standard that sets criteria for the environmental and durability testing of electronic devices. It means this device has undergone various tests to demonstrate its resilience in challenging conditions, such as extreme temperatures, humidity, vibration, and shock. IP68 / MIL-STD-810G / IK07
- Water / dust resistant / drop-to-concrete resistance up to 1.5m
Dimensions / Weight: This refers to the physical size and weight of the device, measured in millimeter (mm) and grams (g) respectively. 156.5 x 77.2 x 17.8 mm / 300 grams
SIM SIM stands for "Subscriber Identity Module." It is a small card, typically inserted into a slot in a mobile phone, that contains important information for connecting the device to a mobile network. SIM cards can come in various sizes, including standard SIM, micro SIM, nano SIM, or even electronic (eSIM), depending on the phone's design. Hybrid Dual SIM (Nano-SIM, dual stand-by)


Screen Display refers to the screen or visual interface of the device. It includes details such as screen size, resolution, and technology (e.g., LCD, OLED, AMOLED). 5.0-inches / TFT LCD touch screen
Resolution Screen Resolution refers to the number of pixels that make up the display screen and is typically expressed as a combination of horizontal and vertical pixel counts (e.g., 1920 x 1080, 2560 x 1440, or 3840 x 2160). The screen resolution determines the level of detail and sharpness of the visual content displayed on the smartphone's screen. Higher resolutions generally result in crisper and more detailed images and text 720 x 1280 pixels / 16:9 aspect ratio / 319 PPI
Features Camera features encompass various functionalities and capabilities that enhance the device's photography and videography experience. These features can include Optical Image Stabilization (OIS) Panorama, HDR, Ai Mode, Night Mode, Portrait Mode, etc. Display protected with Corning Gorilla Glass 3


OS This is the Operating System. It refers to the software platform that runs on the smartphone and manages the device's hardware and software resources. Common smartphone operating systems include Android (developed by Google), iOS (developed by Apple). Google Android 8.1 (Oreo)
Chipset This refers to the integrated circuit that serves as the device's central processing unit (CPU). It plays a pivotal role in the smartphone's performance, speed, and energy efficiency. MediaTek MT6739
- Quad-core 1.5GHz Cortex-A53
- PowerVR GE8100 GPU
Memory This encompasses two components: storage capacity and RAM (Random Access Memory). Storage capacity, typically measured in gigabytes (GB) or terabytes (TB), dictates how much internal space is available for apps, files, and media storage. RAM, measured in gigabytes (GB), is temporary memory crucial for multitasking and app performance, with more RAM generally leading to smoother operation and faster task-switching capabilities. 2GB RAM + 16GB ROM / SD-card support (uses SIM 2 slot)


Main The main camera, also known as the rear camera, is the primary camera on the back of the smartphone. It is typically used for capturing photos and videos in various scenarios and is often the more powerful and versatile camera on the device 8MP single rear camera with PDAF
Selfie The selfie camera, also known as the front-facing camera, is the camera on the front of the smartphone, primarily used for capturing selfies and video calls 5MP selfie camera (fixed focus), No LED flash
Features Camera features encompass various functionalities and capabilities that enhance the device's photography and videography experience. These features can include Optical Image Stabilization (OIS) Panorama, HDR, Ai Mode, Night Mode, Portrait Mode, etc. 1080p@30fps video recording / LED Flash


Connectivity This encompasses the device's ability to connect and communicate with other devices and networks. It includes features such as cellular connectivity, Wi-Fi, Bluetooth, NFC (Near Field Communication), and USB connectivity options. NFC / Bluetooth 4.2 A2DP / WiFi 2.4G-5G / FM Radio / USB Type-C
Navigation Navigation refers to the device's ability to determine and display location information and provide directions to users. This functionality is usually powered by Global Positioning System (GPS) technology. A-GPS, GLONASS, BeiDou
Sensors This refers to the various built-in sensors that enable the device to gather information from its environment and interactions. Common sensors found in rugged smartphones may include fingerprint sensor, light sensor, barometer sensor among others. Accelerometer, gyro, proximity, compass, barometer

Battery and Others

Battery This section refers to the device's power source and its related specifications. This typically includes details such as the battery capacity, measured in milliampere-hours (mAh) or watt-hours (Wh), and it charging details. Li-Po 5000mAh, non-removable
Others This is a catch-all category that includes various additional features, specifications, or capabilities that don't fall under the major categories like display, camera, memory, or connectivity. Built-in 1D and 2D code scanner
- Black and Orange color

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Disclaimer Note

This specification was entered manually, hence we CANNOT guarantee 100% accuracy. Any error? Let us know in the comment section.

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