Sources and limitations

Listed specifications are reference information, not results of TechMyte testing. Rumored details may change, and hardware or supported features can differ by region. Confirm the exact model with its manufacturer before buying.

Battery capacity does not establish tested endurance; megapixel count does not establish camera quality. Use the comparison tool to identify differences, then check the features that matter to your use.

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Technical data sheet

Full Specifications

Network

Technology	GSM / HSPA / LTE
2G bands	GSM 850 / 900 / 1800 / 1900
3G bands	HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands	1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 41, 40
Speed	HSPA, LTE

Launch

Announced	2026, March 04
Status	Available. Released 2026, March

Body

Dimensions	167.7 x 78.8 x 7.7 mm (6.60 x 3.10 x 0.30 in)
Weight	-
SIM	Nano-SIM + Nano-SIM
Build	Glass front, plastic back, plastic frame

Battery

Type	5200 mAh
Charging	15W wired 5W reverse wired

Display

Size	6.78 inches, 109.5 cm2 (~82.9% screen-to-body ratio)
Resolution	720 x 1576 pixels, 19.5:9 ratio (~259 ppi density)
Type	IPS LCD, 120Hz, 700 nits (HBM)

Platform

OS	Android 16, XOS 16
Chipset	Mediatek Helio G81 Ultimate (12 nm)
CPU	Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55)
GPU	Mali-G52 MC2

Memory

Card slot	microSDXC (dedicated slot)
Internal	64GB 4GB RAM, 128GB 4GB RAM

Selfie camera

Single	8 MP, f/2.0, (wide), 1/4.0", 1.12µm
Video	1440p@30fps, 1080p@30fps

Sound

Loudspeaker	Yes
3.5mm jack	Yes

Comms

WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth	Yes
Positioning	GPS
NFC	Yes
Radio	FM radio
USB	USB Type-C 2.0, OTG
Infrared port	Yes

Features

Sensors	Fingerprint (side-mounted), accelerometer, proximity, compass

Misc

Colors	Shadow Black, Cloudline Blue, Polaris Titanium, Sunlike Orange
Models	X6840, X6840B

Main Camera

Features	Dual-LED flash, panorama
Video	1440p@30fps, 1080p@30fps
Single	8 MP, f/2.0, (wide), 1/4.0", 1.12µm, AF

Infinix Smart 20