LG K51 Pros and Cons Explained


The LG K51 smartphone is an impressive device, that is filled with tons of features, especially for an entry-level device. This might be why this device was a popular choice when it was released on May the 6th 2020.

If you are on the fence about purchasing the LG K51 smartphone then you are in luck, we have listed the pros and cons of this device to help you decide if the LG K51 device is for you. After all, the last thing you want to do is spend money on a smartphone that does not have the features that you require in a device.

Technical specifications

  • Size: 6.5 inches
  • Weight: 7.17 ounces
  • Display resolution: 1560 x 720 pixels
  • Rear camera: 13 megapixels (triple camera)
  • Front camera: 13 megapixels
  • Battery capacity: 400 mAh
  • Battery life:
  • Battery type: Li-Ion
  • USB: Type-C
  • System chip: MediaTek Helio P22 MT6762
  • Operating system: Android
  • Wireless network type: 4G compatible
  • Bluetooth: 5.0
  • Internal storage: 32 GB
  • Micro SD card: microSDXC

Pros and cons of the LG K51 at a glance


  • Build quality
  • Battery life
  • Screen display
  • Camera
  • Sound quality
  • Affordable


  • Storage
  • Screen resolution
  • Processor
  • Wireless charging
  • Network issues

Pros of LG K51

Build quality

One of the most impressive features of the LG K51 is the device’s durability, especially for an entry-level smartphone. The LG K51 features a metal frame and is MIL-STD-8106 compliant. MIL-STD-8106 is a US military specification that is used to ensure the durability of a device in harsh environments.

MIL-STD-8106 compliant devices have to undergo 29 tests to prove their durability. A few factors that these devices are tested against include, vibration, humidity, high temperature, low temperature, fungus, and more. The fact that the LG K51 meets this standard proves how good the build quality of this device is.

Battery life

The Battery life of the LG K51 is quite impressive, the smartphone features a 400 mAh, Li-Ion battery type. According to the technical specifications of the device, the smartphone’s battery life includes up to 21 hours of talk time which is quite good, especially for an entry-level device. However, what is impressive about the LG K51 is the device’s battery life on standby time which is able to last up to 24.5 days (*Yes, days.*)

Screen display

The LG K51 screen display consists of a 6.5-inch screen that is HD+ and has a FullVision display. The smartphone has a screen aspect ratio of 19.5:9 and a density of 2634 PPI. The screen covers almost the entire front of the device with just a small edging and a camera notch located at the top center of the device. The almost full screen provides a much more immersive experience for the users who enjoy watching videos or playing games on their devices.


The camera on the LG K51 is something that has to be mentioned when discussing the pros of this smartphone. The device features a triple rear camera system that has a 13MP standard angle camera, a 5 MP wide-angle camera, and a 2MP depth camera. The second camera on this smartphone is the front camera which sits at the top center of the screen. The resolution of the front camera is 13MP, which is quite clear for the selfie camera on the device.

Sound quality

When purchasing an entry-level phone people usually do not expect the device to have great sound quality, however, this is not the case with the LG K51. While the sound quality is as good as the top-of-the-range LG smartphone, they are much better than most entry-level devices.

The sound on the phone is quite clear and loud with almost no static noises or distortion even when being played at maximum volume. This means that you will be able to listen to music and watch videos on this device with quite a good sound quality.


Although the LG K51 is known as a budget smartphone the price of the phone is still quite impressive, considering all the features that this device has to offer. When the LG smartphone first launched in 2020 the price of the device was $89.99, which was quite affordable compared to other smartphones that were released in that year. Usually, even budget smartphones retail at more than $100 but this is not the case with the LG K51. Since the phone was released in 2020, this means if you are thinking about purchasing this device it will be even cheaper right now.

Cons of LG K51


One of the most important disadvantages of the LG K51 is the device’s storage capacity. According to the smartphone’s technical specifications, it has 32GB of storage, however, this is not the amount of storage the user will have access to. Users are only able to use 16GB of storage on their LG K51 devices which is quite low especially in 2020 when the phone was released. However, the LG K51 is compatible with microSD memory cards and if you run out of storage you can get this for more storage space.

Screen resolution

While the LG K51 has an impressive screen display the device’s screen resolution is not the best. The screen resolution of the device is 1560 x 720 pixels on a 6.5-inch IPS LCD screen. This means the pixel density on the device is 264 PPI, which is quite low compared to the other LG lower-level smartphones.

The reason why the low resolution is quite bad and something that needs to be considered is because does impact the viewing experience on the device. If you want to get a smartphone because you want to play games and watch videos then a device with low resolution might not be the best option.


A notable concern of the LG K51 is the device’s slow processor, this device features a 2GHz Helio P22 processor. This processor tends to lag making the user experience quite poor because nobody wants to use a slow phone. It is important to remember that the LG K51 is considered to be a budget-friendly phone which is why it might not have the fastest processor, however, other budget-friendly devices are much faster.

Wireless Charging

If you want a phone that you will be able to charge wirelessly, then the LG K51 smartphone might not be the one for you. One of the disadvantages of this smartphone is that it does not support wireless charging. This means that the only way that this device can be charged is through micro-USB charging. While this is a budget phone it is important to consider that there are quite a few budget smartphones that support wireless charging.

Network Issues

After the release of the LG K51 in 2020, a few users of the device reported that they had experienced network issues. This was quite a serious issue for certain users who even had to send their LG K51 smartphones back to be reset. Meaning that users were unable to use key features on their devices including sending messages, browsing, making phone calls, and more. So the last thing anyone wants their new phone to have is network connectivity issues.

LG K51



Does the LG K51 last have a fingerprint sensor?

The LG K51 has a fingerprint sensor, meaning you can use your fingerprint to unlock your device. The device allows a maximum of 5 fingerprints that can be added to the phone. To ensure that your fingerprint sensor will work make sure that you wipe down your finger, removing any dirt, oil, and moisture.

Can the LG K51 be cast to TV?

The LG K51 is able to cast to a TV, this means that you will be able to see the screen of your phone on the TV that you are casting to. To be able to do this both the smartphone and TV will have to be connected to the same Wi-Fi connection.

Does the LG K51 have a headphone jack?

While quite a few devices are moving towards diverse headphone connections, the LG K51 still has a headphone jack. The LG K51 has a 3.5mm headphone jack which means that almost all standard headphones will connect to this device. The device also supports wireless headphones via the Bluetooth feature on the device.

Does the LG K51 have Android 11?

The LG K51 was initially released with Android 9 in 2020, however, the software of the device was then upgraded to Android 10 in 2021. Now the device’s operating system is being upgraded to Android 11, which is quite a big update for the smartphone.


The LG K51 is a smartphone that has quite a lot to offer as an entry-level device. The smartphone is filled with impressive technology and has several pros including the build quality, battery life, screen display, camera, and sound quality.

However, the device also has a few cons that cannot be ignored, especially if you are considering purchasing this device. These cons include storage limitations, low screen resolution, slow processor, and unable to be wirelessly charged. Now that you know the pros and cons of the LG K51 you will be able to decide whether this is the smartphone for you.


Filip Poutintsev, the Chief Editor of Honest Pros and Cons, is a long term business writer, who has been featured in various online publications such as Forbes, CoinTelegraph and HackerNoon. Now he writes exclusively for Honest Pros and Cons.