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Karbonn

Karbonn K9 Smart Plus (2018)

Android OS v7.0 (Nougat)
Mediatek MT6737
Mali-T720 MP1
1 GB / 8 GB
5.45 inch (720 x 1440 px)
5 MP, 2592 x 1944 px, autofocus

The manufacturer offers this phone with a 5.45 inch IPS display, a Mediatek MT6737 SoC, and 1 GB of RAM.

Will it prove its worth? I aim to reveal that by the end of my review.

Table of Contents

This article shares our personal experiences and thoughts about using the Karbonn K9 Smart Plus smartphone. We hope to offer helpful insights to others interested in this device.

Karbonn K9 Smart Plus / 1

Karbonn K9 Smart Plus specifications

BrandKarbonn
NameK9 Smart Plus
ModelK9SP
Release date2018

Weight, dimensions, colors

Weight5.75 oz
Dimensions5.85 x 2.81 x 0.35 inch
Colorsblue, champagne, red
SIM typeMicro SIM

The weight of Karbonn K9 Smart Plus is about 5.75 oz with battery. This is average for smartphones of the same size. A micro SIM is a smaller version of the standard SIM card used in mobile devices.

System, chipset, performance

OS versionAndroid OS v7.0 (Nougat)
SoCMediatek MT6737
CPUQuad-core 1.3 GHz Cortex-A53
GPUMali-T720 MP1
PerformanceAnTuTu v9: 42289

The Karbonn K9 Smart Plus comes with Android OS v7.0 (Nougat) out of the box. Android is a mobile operating system. Google built it using a modified version of the Linux kernel. They also used other open-source software. The mid-range CPU can deliver fast, efficient performance for many tasks. Many mobile devices use ARM Mali GPUs. They are well known for their good performance and power efficiency. We use AnTuTu app to measure general processing performance. AnTuTu Benchmark is the most popular benchmark app for Android phones.

Karbonn K9 Smart Plus / 1

Display type, size, resolution

Display typeIPS
Screen size5.45 inch
Resolution720 x 1440 px
Multitouch supportyes

The 5.45 inch IPS display has better features. These include optimal viewing angles, color accuracy, and unchanging color reproduction. The 5.45 inch display make this smartphone pocket-friendly. The size of the screen is measured diagonally, from corner to corner.

Memory, storage

RAM1 GB
Internal storage8 GB
Memory card slotmicroSD

1 GB of RAM is not typically considered to be enough for a smartphone. More RAM lets us keep more apps and processes open in the background. This keeps the device from slowing down. Most people think a smartphone needs at least 32 GB of storage. The K9 Smart Plus has only 8 GB. We can expand the internal storage (8 GB) with a compatible microSD card.

Karbonn K9 Smart Plus / 2

Cameras, flash

Main camera5 MP, 2592 x 1944 px, autofocus
FlashLED
Selfie camera5 MP

This single camera can be enough for many smartphone users, it depends on their photography needs and preferences. The main camera of K9 Smart Plus smartphone does not have OIS. The optical image stabilization (OIS) is an important feature in smartphones.

Connectivity, network, wireless

GSM 2G bands900 / 1800
Network coverage2G / 3G / 4G
Wi-FiWi-Fi 802.11 b/g/n
Bluetoothv4.0, A2DP
GPSA-GPS
NFCno
FM radiono
USBmicroUSB 2.0
Headphone3.5 mm jack

The 4G provides faster data transfer speeds compared to previous generations. This phone like all modern smartphones, is capable of connecting to Wi-Fi networks. The K9 Smart Plus smartphone is capable of connecting to Bluetooth devices. This phone has a built-in GPS. The phone isn't NFC (Near Field Communication) capable. NFC is not essential for basic phone functionality, but it can be useful. The 3.5 mm headphone jack allows us to connect wired headphones or earphones to the device.

Battery type, capacity, charger

TypeLi-Po 2800 mAh, non-removable

The Li-Po 2800 mAh, non-removable battery gives the smartphone a good battery backup. The lithium polymer (Li-Po) battery is a light-weight, rechargeable battery. The battery of K9 Smart Plus isn't removable without voiding the warranty.

Features, sensors, specials

Sensorsaccelerometer, light, proximity
SpecialsDual SIM

Today, smartphones come with many sensors. They help make the user experience better. The accelerometer is a sensor. It measures the tilting motion and orientation of the phone. The light sensor detects the level of light in the environment. Dual SIM is great for businesses. They want to give staff a device with separate numbers and bills for personal and business use.

Verdict, pros and cons

Every phone has its strengths and weaknesses, and this Karbonn phone is no exception. As with any device, there are aspects that shine and others that fall short. By examining both sides, we can paint a complete picture of what this phone has to offer. Let's explore its standout features and areas for improvement. Remember, this is just my opinion, and yours might be different.

Pros

  • microSD slot
  • Dual SIM support

Cons

  • weak performance
  • limited-size screen
  • insufficient memory
  • insufficient internal storage
  • single camera setup
  • no OIS function
  • no 5G support
  • no NFC feature
  • no Type-C USB port
  • low-capacity battery
  • no digital compass
  • no fingerprint reader
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Lucas Bradley I'm Lucas Bradley, the founder of the Phone42.com site. I love technology, especially smartphones, and I've been working with tech stuff for more than 20 years. This means I've seen a lot of changes and have learned a bunch about what makes a good phone. On Phone42.com, I look at all kinds of phones. They can be from big, well-known companies or new ones trying to make their mark. I want to help people understand what's new and cool in the world of smartphones, in a way that's easy to get.
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