INFINIX SMART 20 3GB RAM + 64GB ROM | 4GB RAM + 64GB ROM | 4GB RAM + 128GB ROM (X6840)
Price range: ₦148,400.00 through ₦176,550.00
Infinix SMART 20 3GB RAM + 64GB ROM | 4GB RAM + 64GB ROM | 4GB RAM + 128GB ROM – Smooth 120Hz Display, Reliable Performance and Long-Lasting Battery
The Infinix SMART 20 is an affordable smartphone designed for users who want smooth everyday performance, a large high-refresh-rate display, practical photography and dependable battery life. Available in 3GB RAM + 64GB ROM, 4GB RAM + 64GB ROM and 4GB RAM + 128GB ROM configurations, the smartphone combines a MediaTek Helio G81 Ultimate processor, a 6.78-inch HD+ display with a refresh rate of up to 120Hz, an 8MP rear camera and a 5200mAh battery with 15W charging support.
Running Android 16 with Infinix’s XOS 16 interface on the listed X6840-series variant, the SMART 20 is designed for everyday communication, social media, web browsing, online learning, video streaming and compatible mobile games.
The 3GB RAM + 64GB ROM configuration is suitable for essential smartphone activities, while the 4GB RAM + 64GB ROM version offers additional physical memory for multitasking. The 4GB RAM + 128GB ROM version provides the same physical RAM as the 4GB/64GB model but doubles the internal storage, making it suitable for users who keep more applications, photographs, videos and documents on their phones.
Specifications
| Attribute | Specification |
|---|---|
| Brand | Infinix |
| Model | SMART 20 |
| Model code | X6840 / X6840B, depending on region |
| Network | 2G / 3G / 4G LTE |
| Display | 6.78-inch IPS LCD |
| Resolution | 720 × 1576 pixels, HD+ |
| Refresh rate | Up to 120Hz |
| Brightness | Up to 700 nits in high-brightness mode, listed |
| Processor | MediaTek Helio G81 Ultimate |
| CPU | Octa-core |
| GPU | Mali-G52 |
| Physical RAM | 3GB / 4GB, depending on variant |
| Extended RAM | Up to 8GB total RAM advertised on supported 4GB variants, including virtual expansion |
| Internal storage | 64GB / 128GB |
| RAM and storage configurations | 3GB + 64GB / 4GB + 64GB / 4GB + 128GB |
| Storage type | eMMC |
| RAM type | LPDDR4X |
| Expandable storage | microSD card, up to 2TB listed |
| Rear camera | 8MP with autofocus |
| Front camera | 8MP |
| Video recording | Up to 1440p at 30fps, listed |
| Battery | 5200mAh |
| Charging | 10W charger supplied in listed configurations; 15W charging supported |
| Reverse charging | 5W wired reverse charging, supported |
| Operating system | Android 16 |
| User interface | XOS 16 |
| SIM | Dual Nano-SIM |
| Wi-Fi | Dual-band Wi-Fi, 802.11 a/b/g/n/ac |
| Bluetooth | Supported; version depends on regional specification |
| NFC | Available on selected regional configurations |
| USB | USB Type-C |
| Audio | Dual speakers with DTS audio |
| Headphone jack | 3.5mm |
| Fingerprint sensor | Supported |
| Additional features | Dynamic Bar, Always-On Display features and infrared blaster, where supported |
| Water and dust resistance | IP64 |
| Dimensions | Approximately 167.7 × 78.8 × 7.7mm |
| Weight | Confirm regional configuration |
| Colours | Shadow Black, Polaris Titanium, Sunlike Orange and Cloudline Blue |
| SKU | X6840 |
| GTIN | Not provided |
Variant note: Infinix’s published SMART 20 specifications list 4GB/64GB and 4GB/128GB configurations. The 3GB/64GB version should be confirmed against the physical stock label and supplier specifications before publishing it as an official variant.
Immersive 6.78-Inch HD+ 120Hz Display
Enjoy a large viewing area with the Infinix SMART 20’s 6.78-inch IPS LCD display. Its HD+ resolution of 720 × 1576 pixels provides a practical screen for reading messages, browsing websites, watching videos and using everyday applications.
The display supports a refresh rate of up to 120Hz, helping deliver smoother scrolling, animations and compatible gaming experiences compared with standard 60Hz screens.
With its spacious screen and high refresh rate, the SMART 20 is suitable for social media, online learning, video streaming and everyday entertainment.
MediaTek Helio G81 Ultimate Performance
The Infinix SMART 20 is powered by the MediaTek Helio G81 Ultimate processor, featuring an octa-core CPU and Mali-G52 graphics.
This hardware is designed to support everyday smartphone activities such as calls, messaging, web browsing, social networking, video playback and compatible mobile games.
The 3GB RAM + 64GB ROM variant is a practical option for users who primarily use essential applications and require a budget-friendly smartphone.
The 4GB RAM + 64GB ROM variant offers additional physical memory compared with the 3GB version, helping manage everyday multitasking.
The 4GB RAM + 128GB ROM variant combines 4GB physical RAM with twice the storage of the 64GB model, providing more room for applications, downloaded videos, photographs and documents.
Selected configurations support virtual RAM expansion. This feature uses a portion of internal storage to supplement memory management and does not replace physical RAM.
8MP Rear Camera for Everyday Photography
Capture everyday moments with the Infinix SMART 20’s 8MP rear camera, featuring autofocus.
The camera is suitable for casual photography, family pictures, document capture, product photographs and social media sharing.
Supported camera modes include AI Cam, portrait, panorama, time-lapse, night photography and document capture, depending on the installed software.
Image quality depends on lighting conditions, camera settings, subject movement and the shooting environment.
8MP Front Camera for Selfies and Video Calls
The 8MP front-facing camera supports selfies, video calls, online classes and everyday communication.
It provides a convenient way to capture self-portraits and stay connected with friends, family and colleagues.
The camera supports everyday photography and video recording, with available recording modes depending on the software and selected settings.
5200mAh Battery and Charging Support
The Infinix SMART 20 features a 5200mAh battery designed to support daily activities such as calling, messaging, browsing, social media and video playback.
Its battery capacity helps reduce the need for frequent charging during typical everyday use.
The phone supports charging at up to 15W, while listed retail configurations may include a 10W charger. Actual charging speed depends on the charger supplied, compatible power input, temperature and charging conditions.
The device also supports 5W wired reverse charging, where enabled, allowing it to supply power to compatible devices.
Battery endurance varies according to screen brightness, mobile network conditions, application usage and other factors.
Android 16 and Infinix XOS 16
The Infinix SMART 20 runs Android 16 with Infinix’s XOS 16 interface on the listed regional variant.
The software provides access to familiar Android applications and everyday features for communication, productivity, entertainment and personalisation.
Features such as Dynamic Bar and supported Always-On Display functionality add convenience to everyday smartphone use.
Software features, update availability and certain interface options may vary according to regional configuration and installed firmware.
Slim Design and IP64 Protection
The Infinix SMART 20 features a slim design measuring approximately 167.7 × 78.8 × 7.7mm.
Its modern appearance is complemented by colour options such as Shadow Black, Polaris Titanium, Sunlike Orange and Cloudline Blue, depending on market availability.
The listed IP64 rating provides dust protection and resistance to water splashes under specified test conditions. It does not make the smartphone waterproof, so avoid submerging it in water or exposing it to high-pressure liquids.
Dual Speakers and Everyday Entertainment
Enjoy compatible music, videos and other audio content through the Infinix SMART 20’s dual-speaker system with DTS audio support.
The 3.5mm headphone jack provides a convenient connection for compatible wired headphones, while Bluetooth supports compatible wireless audio accessories.
Combined with the large 120Hz display and 5200mAh battery, the SMART 20 is suitable for video streaming, music playback, online learning and casual gaming.
Connectivity and Everyday Convenience
The Infinix SMART 20 offers a range of practical connectivity features, including:
- 4G LTE, 3G and 2G network connectivity.
- Dual Nano-SIM support.
- Dual-band Wi-Fi.
- Bluetooth connectivity.
- GPS and location services.
- USB Type-C charging and data transfer.
- OTG support.
- Dedicated microSD card expansion.
- Side-mounted fingerprint sensor, where specified.
- Infrared remote-control functionality on supported variants.
- 3.5mm headphone jack.
- NFC on selected regional configurations.
- IP64 dust and splash resistance.
The Infinix SMART 20 is a 4G smartphone, not a 5G device. NFC and certain other features may differ by market, so verify the exact unit before confirming availability.
Why Choose the Infinix SMART 20?
- Large 6.78-inch HD+ display.
- Up to 120Hz refresh rate for smoother scrolling.
- MediaTek Helio G81 Ultimate octa-core processor.
- Three requested memory configurations: 3GB/64GB, 4GB/64GB and 4GB/128GB.
- Virtual RAM expansion on supported configurations.
- 8MP rear camera with autofocus.
- 8MP front-facing camera.
- Large 5200mAh battery.
- Up to 15W supported charging.
- Android 16 with XOS 16 on the listed regional model.
- Dual speakers with DTS audio support.
- 3.5mm headphone jack.
- Dual Nano-SIM and 4G connectivity.
- Expandable storage up to 2TB, as listed.
- IP64 dust and splash resistance.
- Slim 7.7mm design.
- Multiple colour options, including Sunlike Orange.
Which Infinix SMART 20 Variant Should You Choose?
Infinix SMART 20 3GB RAM + 64GB ROM
A budget-friendly option for essential smartphone activities, including calls, messaging, browsing and everyday applications. Confirm that the 3GB/64GB configuration matches your supplier’s stock.
Infinix SMART 20 4GB RAM + 64GB ROM
A practical choice for users who want 4GB physical RAM for everyday multitasking while keeping the same 64GB storage capacity.
Infinix SMART 20 4GB RAM + 128GB ROM
A suitable option for users who want 4GB physical RAM and additional storage for more applications, photographs, videos, games and documents.
All three requested configurations are intended to be listed under the same product family, with RAM and storage options selected according to available stock.
Buy Infinix SMART 20 at Fastlink Phones & Gadgets
Looking for an affordable smartphone that combines a large 120Hz display, practical everyday performance, convenient camera features and a long-lasting battery?
The Infinix SMART 20 is offered in three requested configurations to suit different memory and storage needs:
- 3GB RAM + 64GB ROM – a practical entry-level option.
- 4GB RAM + 64GB ROM – additional physical RAM for everyday multitasking.
- 4GB RAM + 128GB ROM – more storage for applications and personal files.
Shop at Fastlink Phones & Gadgets for your smartphone and electronics needs.
Contact Fastlink: 08034557575
Only logged in customers who have purchased this product may leave a review.
Infinix SMART 20 3GB RAM + 64GB ROM | 4GB RAM + 64GB ROM | 4GB RAM + 128GB ROM – Smooth 120Hz Display, Reliable Performance and Long-Lasting Battery
The Infinix SMART 20 is an affordable smartphone designed for users who want smooth everyday performance, a large high-refresh-rate display, practical photography and dependable battery life. Available in 3GB RAM + 64GB ROM, 4GB RAM + 64GB ROM and 4GB RAM + 128GB ROM configurations, the smartphone combines a MediaTek Helio G81 Ultimate processor, a 6.78-inch HD+ display with a refresh rate of up to 120Hz, an 8MP rear camera and a 5200mAh battery with 15W charging support.
Running Android 16 with Infinix’s XOS 16 interface on the listed X6840-series variant, the SMART 20 is designed for everyday communication, social media, web browsing, online learning, video streaming and compatible mobile games.
The 3GB RAM + 64GB ROM configuration is suitable for essential smartphone activities, while the 4GB RAM + 64GB ROM version offers additional physical memory for multitasking. The 4GB RAM + 128GB ROM version provides the same physical RAM as the 4GB/64GB model but doubles the internal storage, making it suitable for users who keep more applications, photographs, videos and documents on their phones.
Specifications
| Attribute | Specification |
|---|---|
| Brand | Infinix |
| Model | SMART 20 |
| Model code | X6840 / X6840B, depending on region |
| Network | 2G / 3G / 4G LTE |
| Display | 6.78-inch IPS LCD |
| Resolution | 720 × 1576 pixels, HD+ |
| Refresh rate | Up to 120Hz |
| Brightness | Up to 700 nits in high-brightness mode, listed |
| Processor | MediaTek Helio G81 Ultimate |
| CPU | Octa-core |
| GPU | Mali-G52 |
| Physical RAM | 3GB / 4GB, depending on variant |
| Extended RAM | Up to 8GB total RAM advertised on supported 4GB variants, including virtual expansion |
| Internal storage | 64GB / 128GB |
| RAM and storage configurations | 3GB + 64GB / 4GB + 64GB / 4GB + 128GB |
| Storage type | eMMC |
| RAM type | LPDDR4X |
| Expandable storage | microSD card, up to 2TB listed |
| Rear camera | 8MP with autofocus |
| Front camera | 8MP |
| Video recording | Up to 1440p at 30fps, listed |
| Battery | 5200mAh |
| Charging | 10W charger supplied in listed configurations; 15W charging supported |
| Reverse charging | 5W wired reverse charging, supported |
| Operating system | Android 16 |
| User interface | XOS 16 |
| SIM | Dual Nano-SIM |
| Wi-Fi | Dual-band Wi-Fi, 802.11 a/b/g/n/ac |
| Bluetooth | Supported; version depends on regional specification |
| NFC | Available on selected regional configurations |
| USB | USB Type-C |
| Audio | Dual speakers with DTS audio |
| Headphone jack | 3.5mm |
| Fingerprint sensor | Supported |
| Additional features | Dynamic Bar, Always-On Display features and infrared blaster, where supported |
| Water and dust resistance | IP64 |
| Dimensions | Approximately 167.7 × 78.8 × 7.7mm |
| Weight | Confirm regional configuration |
| Colours | Shadow Black, Polaris Titanium, Sunlike Orange and Cloudline Blue |
| SKU | X6840 |
| GTIN | Not provided |
Variant note: Infinix’s published SMART 20 specifications list 4GB/64GB and 4GB/128GB configurations. The 3GB/64GB version should be confirmed against the physical stock label and supplier specifications before publishing it as an official variant.
Immersive 6.78-Inch HD+ 120Hz Display
Enjoy a large viewing area with the Infinix SMART 20’s 6.78-inch IPS LCD display. Its HD+ resolution of 720 × 1576 pixels provides a practical screen for reading messages, browsing websites, watching videos and using everyday applications.
The display supports a refresh rate of up to 120Hz, helping deliver smoother scrolling, animations and compatible gaming experiences compared with standard 60Hz screens.
With its spacious screen and high refresh rate, the SMART 20 is suitable for social media, online learning, video streaming and everyday entertainment.
MediaTek Helio G81 Ultimate Performance
The Infinix SMART 20 is powered by the MediaTek Helio G81 Ultimate processor, featuring an octa-core CPU and Mali-G52 graphics.
This hardware is designed to support everyday smartphone activities such as calls, messaging, web browsing, social networking, video playback and compatible mobile games.
The 3GB RAM + 64GB ROM variant is a practical option for users who primarily use essential applications and require a budget-friendly smartphone.
The 4GB RAM + 64GB ROM variant offers additional physical memory compared with the 3GB version, helping manage everyday multitasking.
The 4GB RAM + 128GB ROM variant combines 4GB physical RAM with twice the storage of the 64GB model, providing more room for applications, downloaded videos, photographs and documents.
Selected configurations support virtual RAM expansion. This feature uses a portion of internal storage to supplement memory management and does not replace physical RAM.
8MP Rear Camera for Everyday Photography
Capture everyday moments with the Infinix SMART 20’s 8MP rear camera, featuring autofocus.
The camera is suitable for casual photography, family pictures, document capture, product photographs and social media sharing.
Supported camera modes include AI Cam, portrait, panorama, time-lapse, night photography and document capture, depending on the installed software.
Image quality depends on lighting conditions, camera settings, subject movement and the shooting environment.
8MP Front Camera for Selfies and Video Calls
The 8MP front-facing camera supports selfies, video calls, online classes and everyday communication.
It provides a convenient way to capture self-portraits and stay connected with friends, family and colleagues.
The camera supports everyday photography and video recording, with available recording modes depending on the software and selected settings.
5200mAh Battery and Charging Support
The Infinix SMART 20 features a 5200mAh battery designed to support daily activities such as calling, messaging, browsing, social media and video playback.
Its battery capacity helps reduce the need for frequent charging during typical everyday use.
The phone supports charging at up to 15W, while listed retail configurations may include a 10W charger. Actual charging speed depends on the charger supplied, compatible power input, temperature and charging conditions.
The device also supports 5W wired reverse charging, where enabled, allowing it to supply power to compatible devices.
Battery endurance varies according to screen brightness, mobile network conditions, application usage and other factors.
Android 16 and Infinix XOS 16
The Infinix SMART 20 runs Android 16 with Infinix’s XOS 16 interface on the listed regional variant.
The software provides access to familiar Android applications and everyday features for communication, productivity, entertainment and personalisation.
Features such as Dynamic Bar and supported Always-On Display functionality add convenience to everyday smartphone use.
Software features, update availability and certain interface options may vary according to regional configuration and installed firmware.
Slim Design and IP64 Protection
The Infinix SMART 20 features a slim design measuring approximately 167.7 × 78.8 × 7.7mm.
Its modern appearance is complemented by colour options such as Shadow Black, Polaris Titanium, Sunlike Orange and Cloudline Blue, depending on market availability.
The listed IP64 rating provides dust protection and resistance to water splashes under specified test conditions. It does not make the smartphone waterproof, so avoid submerging it in water or exposing it to high-pressure liquids.
Dual Speakers and Everyday Entertainment
Enjoy compatible music, videos and other audio content through the Infinix SMART 20’s dual-speaker system with DTS audio support.
The 3.5mm headphone jack provides a convenient connection for compatible wired headphones, while Bluetooth supports compatible wireless audio accessories.
Combined with the large 120Hz display and 5200mAh battery, the SMART 20 is suitable for video streaming, music playback, online learning and casual gaming.
Connectivity and Everyday Convenience
The Infinix SMART 20 offers a range of practical connectivity features, including:
- 4G LTE, 3G and 2G network connectivity.
- Dual Nano-SIM support.
- Dual-band Wi-Fi.
- Bluetooth connectivity.
- GPS and location services.
- USB Type-C charging and data transfer.
- OTG support.
- Dedicated microSD card expansion.
- Side-mounted fingerprint sensor, where specified.
- Infrared remote-control functionality on supported variants.
- 3.5mm headphone jack.
- NFC on selected regional configurations.
- IP64 dust and splash resistance.
The Infinix SMART 20 is a 4G smartphone, not a 5G device. NFC and certain other features may differ by market, so verify the exact unit before confirming availability.
Why Choose the Infinix SMART 20?
- Large 6.78-inch HD+ display.
- Up to 120Hz refresh rate for smoother scrolling.
- MediaTek Helio G81 Ultimate octa-core processor.
- Three requested memory configurations: 3GB/64GB, 4GB/64GB and 4GB/128GB.
- Virtual RAM expansion on supported configurations.
- 8MP rear camera with autofocus.
- 8MP front-facing camera.
- Large 5200mAh battery.
- Up to 15W supported charging.
- Android 16 with XOS 16 on the listed regional model.
- Dual speakers with DTS audio support.
- 3.5mm headphone jack.
- Dual Nano-SIM and 4G connectivity.
- Expandable storage up to 2TB, as listed.
- IP64 dust and splash resistance.
- Slim 7.7mm design.
- Multiple colour options, including Sunlike Orange.
Which Infinix SMART 20 Variant Should You Choose?
Infinix SMART 20 3GB RAM + 64GB ROM
A budget-friendly option for essential smartphone activities, including calls, messaging, browsing and everyday applications. Confirm that the 3GB/64GB configuration matches your supplier’s stock.
Infinix SMART 20 4GB RAM + 64GB ROM
A practical choice for users who want 4GB physical RAM for everyday multitasking while keeping the same 64GB storage capacity.
Infinix SMART 20 4GB RAM + 128GB ROM
A suitable option for users who want 4GB physical RAM and additional storage for more applications, photographs, videos, games and documents.
All three requested configurations are intended to be listed under the same product family, with RAM and storage options selected according to available stock.
Buy Infinix SMART 20 at Fastlink Phones & Gadgets
Looking for an affordable smartphone that combines a large 120Hz display, practical everyday performance, convenient camera features and a long-lasting battery?
The Infinix SMART 20 is offered in three requested configurations to suit different memory and storage needs:
- 3GB RAM + 64GB ROM – a practical entry-level option.
- 4GB RAM + 64GB ROM – additional physical RAM for everyday multitasking.
- 4GB RAM + 128GB ROM – more storage for applications and personal files.
Shop at Fastlink Phones & Gadgets for your smartphone and electronics needs.
Contact Fastlink: 08034557575
Reviews
There are no reviews yet.
Only logged in customers who have purchased this product may leave a review.
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