Infinix Smart 9 (64GB / 3GB RAM) specifications and in-depth review

Infinix Smart 9 (64GB / 3GB RAM)

Manufacturer: Infinix

The Infinix Smart 9 is a budget-oriented Android smartphone offering a large 6.7-inch IPS LCD screen with a 120Hz refresh rate and 240Hz touch sampling rate, giving everyday interactions a noticeably smoother feel. Running Android 14 out of the box, it includes a range of software features such as dark mode, split-screen multitasking, picture-in-picture support, dynamic theming, and offline voice recognition, making it a reasonably well-rounded device on the software side.

Under the hood, the Infinix Smart 9 is driven by the MediaTek Helio G81 Ultra chipset built on a 12nm process, paired with 3GB of LPDDR4 RAM and 64GB of eMMC 5.1 internal storage, with a microSD slot available for expansion. The 5000 mAh battery supports 10W fast charging, while connectivity options include dual SIM support, Wi-Fi 5, USB Type-C, GPS with Galileo, and a fingerprint scanner. The main camera shoots at 13MP with phase-detection autofocus and records 1080p video at 30fps, complemented by an 8MP front camera and an IP54 ingress protection rating for basic splash resistance.

Pros
  • The 6.7-inch IPS LCD display runs at a 120Hz refresh rate with a 240Hz touch sampling rate, making scrolling and touch input feel noticeably smooth for everyday use
  • A 5000 mAh battery provides substantial capacity for extended usage between charges
  • IP54 ingress protection offers meaningful resistance to dust and water splashes in daily situations
  • Stereo speakers and a 3.5mm headphone jack are both present, covering wired and speaker-based audio without compromise
  • The main camera includes a useful set of manual controls — ISO, exposure, focus, and white balance — alongside phase-detection autofocus, HDR mode, slow-motion video, timelapse, and panorama
  • An external memory slot allows storage to be expanded beyond the built-in 64GB
Cons
  • With only 3GB of RAM, multitasking headroom is limited and memory-intensive applications may struggle
  • The 720 x 1600 px resolution results in a relatively low pixel density of 262 ppi for a 6.7-inch screen, making fine details less sharp
  • Fast charging is capped at 10W, which is slow for a 5000 mAh battery, and wireless charging is entirely absent
  • NFC is not supported, ruling out contactless payments and related use cases
  • 5G connectivity is not available, limiting the device to 4G LTE networks
  • No optical image stabilization is present on the main camera, which can affect the quality of handheld photos and video in lower-light or motion-heavy conditions
Who is this for?

This device suits users who prioritize battery longevity and screen size for everyday tasks like social media browsing, video streaming, and casual communication. The 5000 mAh capacity, 6.7-inch display, and 120Hz refresh rate make it a comfortable choice for media consumption and light daily use. The IP54 rating also makes it reasonable for users who want basic splash protection in routine outdoor or on-the-go situations, while the dual SIM support and expandable storage cater well to users who need flexible connectivity and extra room for files or media.

Who is this NOT for?

Users who rely on demanding multitasking or resource-heavy applications will find the 3GB of RAM a significant constraint, as it leaves little headroom for running multiple apps simultaneously without slowdowns. The 720p resolution spread across a 6.7-inch panel may also disappoint those who care about display sharpness for tasks like reading fine text or editing photos. Additionally, the absence of NFC, 5G connectivity, and optical image stabilization makes this a poor fit for users who depend on contactless payments, high-speed mobile data, or stable handheld video recording.

Design:

water resistance Water resistant
weight 188 g
thickness 8.4 mm
width 77.1 mm
height 165.7 mm
volume 107.313948 cm³
Ingress Protection (IP) rating IP54
has a rugged build
can be folded

The Infinix Smart 9 has a standard candy-bar form factor — it does not fold and lacks a rugged build. It measures 165.7 mm tall, 77.1 mm wide, and 8.4 mm thick, with a total volume of around 107.31 cm³ and a weight of 188 g. For everyday protection against splashes and dust, the device carries an IP54 rating, which classifies it as water resistant, though it is not designed to withstand submersion.

Display:

Display type LCD, IPS
screen size 6.7"
pixel density 262 ppi
resolution 720 x 1600 px
refresh rate 120Hz
touch sampling rate 240Hz
brightness (typical) 500 nits
has branded damage-resistant glass
supports HDR10
supports HDR10+
Always-On Display
supports Dolby Vision
Has a secondary screen
has a touch screen

The Infinix Smart 9 features a 6.7-inch IPS LCD touchscreen with a resolution of 720 x 1600 px and a pixel density of 262 ppi. It supports a 120Hz refresh rate paired with a 240Hz touch sampling rate, contributing to smoother on-screen motion and more responsive input. Typical brightness is rated at 500 nits, and the display supports an Always-On mode. The screen does not include branded damage-resistant glass and lacks support for HDR10, HDR10+, or Dolby Vision. There is no secondary screen on this device.

Performance:

internal storage 64GB
RAM 3GB
AnTuTu benchmark score 262000
Chipset (SoC) name MediaTek Helio G81 Ultra
GPU name Mali G52 MP2
CPU speed 2 x 2 & 6 x 1.8 GHz
Geekbench 6 result (multi) 1391
Geekbench 6 result (single) 420
PCMark Work 3.0 performance benchmark 8476
Geekbench 5 result (multi) 1300
Geekbench 5 result (single) 350
Has integrated LTE
RAM speed 1800 MHz
semiconductor size 12 nm
Supports 64-bit
DirectX version DirectX 12
Has integrated graphics
OpenGL version 3.2
OpenGL ES version 3.2
Uses big.LITTLE technology
CPU threads 8 threads
Has TrustZone
maximum memory bandwidth 13.41 GB/s
OpenCL version 2
memory channels 2
L2 cache 0.3 MB
eMMC version 5.1
maximum memory amount 8GB
GPU execution units 2
GPU turbo 950 MHz
number of transistors 5500 million
Thermal Design Power (TDP) 5W
DDR memory version 4
shading units 32
turbo clock speed 2GHz
L3 cache 1 MB

The Infinix Smart 9 is powered by the MediaTek Helio G81 Ultra chipset, built on a 12nm process with 5,500 million transistors and an 8-thread CPU configuration using big.LITTLE technology — two cores running at 2GHz and six at 1.8GHz, with a turbo ceiling of 2GHz. Graphics are handled by the Mali G52 MP2 GPU, which features 2 execution units, 32 shading units, a turbo clock of 950MHz, and supports DirectX 12, OpenGL 3.2, OpenGL ES 3.2, and OpenCL 2. The chip includes integrated LTE, ARM TrustZone security, and 64-bit support. Memory consists of 3GB of LPDDR4 RAM running at 1,800MHz across 2 channels, with a maximum memory bandwidth of 13.41 GB/s and a supported ceiling of 8GB; storage is 64GB via eMMC 5.1, expandable via external slot. Cache is split between 0.3MB of L2 and 1MB of L3, and the chip has a rated TDP of 5W. Benchmark results include an AnTuTu score of 262,000, Geekbench 6 single and multi-core scores of 420 and 1,391 respectively, Geekbench 5 scores of 350 (single) and 1,300 (multi), and a PCMark Work 3.0 result of 8,476.

Cameras:

megapixels (main camera) 13 MP
wide aperture (main camera) 1.9f
Has a dual-lens (or multi-lens) main camera
megapixels (front camera) 8MP
has built-in optical image stabilization
video recording (main camera) 1080 x 30 fps
Has a dual-tone LED flash
number of flash LEDs 2
has a BSI sensor
has a CMOS sensor
has continuous autofocus when recording movies
Has phase-detection autofocus for photos
supports slow-motion video recording
has a built-in HDR mode
has manual exposure
has a flash
optical zoom 0x
has manual ISO
has a serial shot mode
has manual focus
has a front camera
Has laser autofocus
Shoots 360° panorama
has manual white balance
shoots raw
has touch autofocus
has manual shutter speed
can create panoramas in-camera
wide aperture (front camera) 2f
Has timelapse function
Has a front-facing LED flash
has a dual-lens (or multi-lens) front camera
supports HDR10 recording
supports Dolby Vision recording
has a front-facing camera under the display
Has a RGB LED flash
has 3D photo/video recording capabilities

The Infinix Smart 9 carries a single 13MP rear camera with an f/1.9 aperture and a CMOS sensor, though it does not feature a back-illuminated sensor or optical image stabilization. Autofocus is handled via phase-detection, with additional support for touch autofocus and continuous autofocus during video recording; laser autofocus is not present. The main camera offers a solid set of manual controls including exposure, ISO, focus, and white balance, while manual shutter speed is not available. Shooting modes include HDR, burst, panorama, slow-motion video, and timelapse, though 360-degree panorama, RAW capture, HDR10 recording, Dolby Vision recording, and 3D photo or video are not supported. Video recording tops out at 1080p at 30fps. Flash is provided by two LED units, though they do not form a dual-tone or RGB configuration. On the front, there is a single 8MP camera with an f/2.0 aperture — no dual-lens setup, no front flash, and it is not positioned under the display.

Operating system:

Android version Android 14
has clipboard warnings
has location privacy options
has camera/microphone privacy options
has Mail Privacy Protection
has theme customization
can block app tracking
blocks cross-site tracking
has on-device machine learning
has notification permissions
has media picker
Can play games while they download
has dark mode
has Wi-Fi password sharing
has battery health check
has an extra dim mode
has focus modes
has dynamic theming
can offload apps
Has customizable notifications
has Live Text
has full-page screenshots
supports split screen
gets direct OS updates
has PiP
Can be used as a PC
Has sharing intents
has a child lock
Supports widgets
Is free and open source
Has offline voice recognition
has voice commands
Tracks the current position of a mobile device
is a multi-user system
has Quick Start

The Infinix Smart 9 runs Android 14, an open-source platform that supports multi-user accounts, voice commands, offline voice recognition, on-device machine learning, and device tracking. On the privacy side, it offers clipboard warnings, location privacy controls, camera and microphone access management, and the ability to block app tracking, though Mail Privacy Protection and cross-site tracking blocking are not available. The interface supports dark mode, dynamic theming, theme customization, widgets, customizable notifications, notification permission controls, a media picker, Live Text, full-page screenshots, split-screen multitasking, picture-in-picture, and sharing intents. Additional conveniences include an extra dim mode, battery health check, child lock, and the ability to play games while they are still downloading. Wi-Fi password sharing, focus modes, app offloading, Quick Start, and the ability to function as a PC are not supported, and the device does not receive direct OS updates from the vendor.

Battery:

battery power 5000 mAh
has wireless charging
Supports fast charging
charging speed 10W
has a removable battery
has a battery level indicator
has a rechargeable battery

The Infinix Smart 9 is equipped with a 5000 mAh rechargeable battery that is non-removable. It supports fast charging at up to 10W, though wireless charging is not available. A battery level indicator is present, giving users a straightforward way to monitor remaining charge.

Audio:

has a socket for a 3.5 mm audio jack
has stereo speakers
has aptX
has LDAC
has aptX HD
has aptX Adaptive
has aptX Lossless
Has a radio

The Infinix Smart 9 includes a 3.5mm headphone jack and stereo speakers, along with a built-in radio. For Bluetooth audio, none of the high-quality codec standards are supported — aptX, aptX HD, aptX Adaptive, aptX Lossless, and LDAC are all absent.

Connectivity & Features:

has 5G support
Wi-Fi version Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
SIM cards 2 SIM
has an external memory slot
Has USB Type-C
USB version 2
has NFC
download speed 300 MBits/s
upload speed 100 MBits/s
Has a fingerprint scanner
has emergency SOS via satellite
has crash detection
is DLNA-certified
has a gyroscope
supports ANT+
Has a heart rate monitor
has GPS
has a compass
supports Wi-Fi
Has an infrared sensor
has an accelerometer
has a cellular module
Has a barometer
has an HDMI output
Uses 3D facial recognition
Has an iris scanner
Stylus included
supports Galileo
Has motion tracking
Has optical tracking
Has a built-in projector

The Infinix Smart 9 supports dual SIM cards and connects via Wi-Fi 4 (802.11n) and Wi-Fi 5 (802.11ac), though 5G is not available. Cellular connectivity is built in, with download speeds of up to 300 MBits/s and upload speeds of up to 100 MBits/s. The device uses a USB Type-C port running USB 2.0, and includes an external memory slot for storage expansion. NFC is not present, nor is HDMI output. For location, it supports GPS, Galileo, and a compass, while the accelerometer is the only motion sensor on board — there is no gyroscope, barometer, motion tracking, or optical tracking. Security is handled through a fingerprint scanner; 3D facial recognition and an iris scanner are not included. The device lacks a stylus, infrared sensor, ANT+ support, heart rate monitor, crash detection, satellite SOS, DLNA certification, and a built-in projector.

Miscellaneous:

has a video light
Has sapphire glass display
Has a curved display
Has an e-paper display

The Infinix Smart 9 includes a video light, which can be used as a torch during video recording. The display is flat rather than curved, uses no sapphire glass, and is not an e-paper panel.

Final Verdict

The Infinix Smart 9 is a straightforward entry-level smartphone that delivers where its specifications are strongest — a large 6.7-inch display with a 120Hz refresh rate, a generous 5000 mAh battery, and a practical feature set including dual SIM support, expandable storage, stereo speakers, and IP54 splash resistance. It runs Android 14 with a broad range of software capabilities that punch above its hardware tier. That said, the 3GB of RAM, 720p resolution, and absence of NFC or 5G place clear boundaries on what kinds of users it can genuinely serve well. For someone whose daily needs revolve around media consumption, communication, and light tasks rather than intensive workloads or advanced connectivity, the Infinix Smart 9 is a functionally complete device — but users with more demanding expectations will quickly encounter its ceilings.