Infinix SMART 20 4GB RAM Smartphone (64GB/128GB Options)

Infinix SMART 20: 4GB RAM with two storage choices

The Infinix SMART 20 is a 4G smartphone built around a large 6.78-inch HD+ screen, a high refresh-rate mode and a 5200mAh battery. The Bangladesh Star Tech listing identifies two storage choices: 4GB RAM with 64GB storage, or 4GB RAM with 128GB storage. The current BiponiBD catalog record has one generic variant and does not identify which storage unit is supplied. Confirm the selected capacity and color on the exact order before purchase; this guide does not pretend that both options are the same physical unit. The product retains a generic catalog variant/SKU until the exact sellable selection is verified.

Infinix’s official India product page identifies the model as X6840 and gives the detailed hardware and Android 16/XOS 16 software configuration. Star Tech Bangladesh also publishes those software and hardware details for the local listing. Hardware and software configurations can differ by market, so check the phone box and About screen if region or firmware matters. Star Tech currently marks the page Out Of Stock and Price to be announced. Grameenphone’s campaign page lists MRP BDT 15,999 for the 4GB/64GB model and BDT 16,999 for 4GB/128GB, but this is campaign MRP information, not a live stock confirmation or BiponiBD offer. Do not treat the older catalog MSRP or campaign table as today’s BiponiBD checkout price. Ask the seller to confirm stock, selected storage, color, final price and written warranty.

Large 6.78-inch HD+ display with up to 120Hz

Infinix and Star Tech list a 6.78-inch IPS LCD panel with HD+ resolution of 720 × 1576 pixels and refresh modes up to 120Hz. Star Tech reports typical brightness of 560 nits and high-brightness mode up to 700 nits. A refresh rate of 120Hz can make compatible scrolling and animations appear smoother, while the HD+ pixel count keeps the screen less detailed than a Full HD panel of similar size. Brightness and refresh settings affect battery use; supported frame rate also depends on applications and system settings. The large area suits reading, messaging, maps, browsing and video, but one should not expect fine text sharpness comparable with higher-resolution displays. Infinix lists a 90.09% screen ratio and 72% NTSC gamut on its India product page; these are manufacturer regional figures, and visible results depend on settings and content.

MediaTek Helio G81 Ultimate platform

The SMART 20 uses MediaTek’s Helio G81 Ultimate chipset. Infinix lists an octa-core CPU with two Cortex-A75 cores at up to 2.0GHz and six Cortex-A55 cores at up to 1.7GHz, plus Mali-G52 graphics. These parts are intended for everyday Android tasks such as calls, messaging, common social apps, video streaming, navigation and light games. Demanding games, heavy editing and sustained multitasking may require lower settings or fewer active applications. Actual responsiveness depends on available memory, software updates, background activity, heat and app optimization. Product copy should not promise a benchmark score or that every game will run at maximum detail.

4GB RAM and 64GB/128GB storage choices

Star Tech lists 4GB LPDDR4X RAM with eMMC storage options of 64GB and 128GB. Infinix’s India page also lists both combinations. The physical RAM remains 4GB in these published choices; any memory expansion feature should not be described as extra installed RAM. Android and preloaded applications occupy part of the advertised storage, so usable space is lower than the package number. A dedicated microSD slot is listed, and the manufacturer page specifies support up to 2TB. Card capacity and compatibility should be verified against the local manual, and a card may not be included in the box. Check that the order confirmation identifies the 64GB or 128GB selection rather than relying on the shared product model name.

8MP rear and 8MP front cameras

Infinix specifies an 8MP autofocus rear camera and an 8MP front camera, each with f/2.0 optics on the official regional page. Star Tech’s Bangladesh listing also identifies single 8MP rear and 8MP front cameras. The rear setup has a dual flash according to Infinix. Manufacturer camera modes include AI Cam, Portrait, Time-Lapse, Super Night, Pro, Panorama and documents, and the product page lists video recording up to 2K at 30fps for front and rear. Available modes and final video resolution may vary with software and region. This is an everyday camera system for casual daylight photos, document capture and video calls; megapixel counts do not guarantee low-light detail or professional video quality. No optical image stabilization is listed in the sources reviewed.

5200mAh battery and charging details

The manufacturer and Star Tech specify a typical 5200mAh battery. Infinix says a 10W charger is included and that the phone supports 15W charging; Star Tech describes 15W wired charging and 5W reverse wired charging. These details concern the manufacturer’s product configuration and may vary with the charger supplied in the exact Bangladesh box. Charging rate can depend on adapter, cable, device temperature and battery state. Battery duration depends on screen refresh and brightness, mobile reception, calls, camera use, apps and battery age. Capacity alone cannot guarantee a fixed number of hours or days. Confirm the included adapter and supported rate with the seller if charging speed is important.

Android 16, XOS 16 and daily features

Infinix and Star Tech list Android 16 with XOS 16. The product also includes a side-mounted fingerprint sensor, infrared blaster, accelerometer, e-compass, light and proximity sensors; Infinix notes a software-assisted gyroscope. Star Tech describes stereo speakers, DTS audio, a Dynamic Bar interface and Pure Voice call features in its listing. Feature availability may depend on software build, region and later updates. The exact security update duration for the Bangladesh unit was not confirmed. Confirm the settings and included applications on the device if a particular function matters to you.

IP64 rating and physical build

Infinix’s official India page lists IP64 dust and splash resistance and drop protection up to 1.5 metres; Star Tech’s Bangladesh product page lists the same claims. IP64 is not an invitation to submerge the phone or expose it to high-pressure water. Drop resistance describes a test or marketing condition and does not make accidental damage impossible. The listed body measures 167.7 × 78.8 × 7.7mm, with glass on the front and a plastic back and frame. Color names listed by Infinix are Shadow Black, Polaris Titanium, Sunlike Orange and Cloudline Blue; Star Tech’s selection shows Shadow Black and Cloudline Blue. The actual BiponiBD color and product-image match are unverified, so confirm the stock selection. Image reuse rights and image dimensions were not documented.

SIM and connectivity

Infinix describes two Nano SIMs plus a microSD card, 4G/3G/2G network support, dual-band Wi-Fi 802.11 a/b/g/n/ac, Bluetooth, GPS, USB Type-C, OTG, a 3.5mm headphone jack, FM radio and an infrared blaster. The official India page lists LTE bands for that regional model and warns availability can vary by region and operator. Do not assume India bands guarantee Bangladesh carrier compatibility; the full Bangladesh band set and VoLTE behavior were not independently confirmed. Check operator coverage and the exact regional model if you rely on a particular band, roaming or voice-over-LTE. NFC is marked unavailable on the Infinix page. The manufacturer lists expandable storage up to 2TB; confirm the compatible card type and maximum for the actual local unit.

Who may consider the SMART 20?

The SMART 20 may suit someone seeking a large 120Hz screen, everyday 4G use, a 5200mAh battery, expandable storage and an entry-level chipset. It has two documented 4GB RAM storage combinations, so buyers should match the capacity to their photo, app and offline-video needs. The 64GB version costs less in the Grameenphone campaign MRP table, while the 128GB option provides more room; confirm current price and stock rather than treating campaign figures as live offers. Users who need a sharper Full HD panel, 5G, NFC, fast charging beyond 15W, intensive gaming performance or a verified long software-support commitment should compare alternatives carefully. Exact warranty, included accessories, color, selected storage, current BiponiBD offer and local LTE compatibility require confirmation.

Advantages

• Large 6.78-inch HD+ IPS LCD with refresh modes up to 120Hz.
• Two listed 4GB RAM storage choices: 64GB and 128GB.
• 5200mAh battery with USB Type-C and up to 15W support.
• 8MP autofocus rear and 8MP front camera per manufacturer specifications.
• microSD, dual SIM, side fingerprint and IP64 rating are listed by official/local sources.

Limitations and buyer checks

• HD+ resolution and Helio G81 Ultimate are budget-tier tradeoffs for detail and demanding gaming.
• Catalog record has one generic variant while local listing offers two storage combinations; confirm the actual order capacity.
• Current Star Tech listing is Out Of Stock/price to be announced; Grameenphone values are campaign MRPs, not BiponiBD offers.
• Exact manufacturer MPN, GTIN, written order warranty, box contents, color and local LTE band support remain unverified.
• IP64 and drop-resistance claims do not mean waterproof or damage-proof.

Frequently asked questions

Which storage options are available?

Star Tech and Infinix list 4GB RAM with either 64GB or 128GB storage. The current BiponiBD record has one generic variant, so confirm which capacity is being supplied before ordering.

What is the refresh rate and display resolution?

The listed panel is 6.78-inch HD+ at 720 × 1576 pixels, with refresh modes up to 120Hz. Actual mode can depend on settings and application support.

Which processor and operating system does it use?

The SMART 20 uses MediaTek Helio G81 Ultimate. Infinix and Star Tech list Android 16 with XOS 16 for this model; verify the installed build on the exact regional unit.

Does it have expandable storage and dual SIM?

Infinix lists two Nano SIM slots plus microSD and support up to 2TB. Check compatibility and package contents for Bangladesh stock.

What are the battery and charging specifications?

The listed battery is 5200mAh. Infinix describes a 10W included charger and 15W support; Star Tech lists 15W wired and 5W reverse wired. Confirm the exact adapter included with the unit.

Is the phone water-resistant?

Infinix and Star Tech list IP64 dust and splash resistance. It is not a waterproof rating and does not support immersion.

What is the current price in Bangladesh?

Star Tech currently marks its page Out Of Stock and price to be announced. Grameenphone’s campaign table lists MRP 15,999 for 4GB/64GB and 16,999 for 4GB/128GB. Those are campaign MRP figures, not a confirmed BiponiBD checkout offer.

What warranty comes with a BiponiBD order?

No order-specific BiponiBD warranty was verified in this review. Ask for written terms for the exact device and configuration before checkout.

Configuration summary: Infinix SMART 20 (model X6840 per Infinix India); 4GB RAM with 64GB or 128GB storage options; 6.78-inch HD+ 720 × 1576 IPS LCD, up to 120Hz; MediaTek Helio G81 Ultimate; 8MP rear and 8MP front; 5200mAh; Android 16/XOS 16 per Infinix/Star Tech; dual Nano SIM, microSD, 4G, IP64. Star Tech lists Product Code 48324, but this is not a manufacturer MPN. Current Star Tech page shows Out Of Stock; Grameenphone campaign MRP is 15,999 (4+64) and 16,999 (4+128). No live BiponiBD offer or market range is asserted. Sources: Infinix official India product page, Star Tech Bangladesh listing, Grameenphone campaign table.