All About Samsung Galaxy M31 Prime.

Samsung made the Galaxy M31 Prime phone in collaboration with Amazon India. This phone comes with three months’ Amazon Prime membership, that’s why the name is Galaxy M31 Prime.

Samsung Galaxy M31 Prime and M31 are the same phone. Even their weight is also the same, 191g. 

The M31 has three versions, 64GB 6GB RAM, 128GB 6GB RAM, 128GB 8GB RAM. Whereas the Galaxy M31 Prime comes with only 128GB internal storage and 6GB RAM. Another critical difference between these two phones is, the M31 Prime does not have NFC and comes with Samsung One UI 2.0. 

Here are the full specs of Galaxy M31 Prime:

Galaxy M31 Prime featureSpecs
Network Support4G / GSM / HSPA / LTE
Display size6.4 inch Super AMOLED
Screen Resolution1080 x 2340 pixels (403 PPI density)
Display ProtectionCorning Gorilla Glass 3
Rear Camera4 Cameras. 64 MP wide, 123 degrees 8 MP ultra-wide, 5 MP macro, and a 5 MP depth camera.
Front Camera32 MP wide-angle camera.
ProcessorSamsung Octacore Exynos 9611
GPUMali-G72 MP3
USB technologyUSB C 2.0
FM RadioYes
OTG SupportNo
Waterproof and dustproofNo
SIMDual Nano-SIM support
Internal Storage Capacity128 GB
External storage support?Yes
3.5 mm EarjackYes
Wireless chargingNo
Reverse wireless chargingNo
ANT+ SupportNo
Fingerprint SensorYes
OSAndroid 10, Samsung One UI 2.0
BatteryNon-removable Li-Po 6000 mAh.
Fast chargingYes, 15W.
Hearing Aid SupportNo
Available ColorOcean Blue, Space Black, Iceberg Blue
Free Offers3 Months Free Amazon Prime Membership.
Price~ $215

Should you buy Galaxy M31 Prime or not? Learning about the pros and cons of M31 Prime is the perfect way to make a purchase decision. This way, instead of relying on others’ reviews, you be the judge and decide on your future buying decision. 

Pros of Samsung Galaxy M31 Prime:

These are the advantages of M31 Prime.


The biggest pros of the Galaxy M31 is its price. This phone has the same specs as Galaxy M31 but costs less. Compared to other Galaxy phones, M31 Prime is cheap. For example, different Galaxy phones prices are:

  • Galaxy A51 5G: $400.
  • Galaxy F41: $215.
  • Galaxy M31: $250.
  • Galaxy M31 Prime: $215.

Galaxy M31 Prime specs are high, but the price is not that high compared to other Samsung mid-range phones. We think it is a bargain to buy this phone instead of buying other mid-range Samsung phones.


The Galaxy M31 Prime has a 6.4 inch Super AMOLED screen, and its resolution is 1080 x 2340 pixels (403 PPI density). The screen resolution is so high that you won’t be able to distinguish individual pixels. Super AMOLED infinity U screens provide vivid colors and it is far superior to an LCD screen. Here, “U” denotes that this screen has a U shape cutout for the front camera.

Moreover, this screen of the M31 Prime can reach up to 420 nits. That’s bright enough to see the screen in full sunlight.

Expandable Storage:

The Galaxy M31 Prime comes with 128 GB memory options (only 108 GB is available to the user). Moreover, the M31 has an expandable memory slot, where you can insert a microSD card up to 512 GB. It is very convenient because you don’t have to shell out hundreds of dollars for memory upgrades like Apple’s iPhone. 

Here’s an example. The 128 GB iPhone 12 Pro costs $999, and the next storage version, 256 GB, costs $1099. There’s no difference between these two phones except the internal storage capacity. So, Apple is charging you $100 for 128GB memory. Now check the price of this 128 GB Samsung microSD card on Amazon. It is significantly cheaper than Apple’s storage expansion asking price. It is insane that Apple’s storage option is 400% more expensive than the average market price. By now, we hope you do realize the benefit of expandable storage space.

Has a dedicated fingerprint sensor:

The Galaxy M31 Prime has a dedicated fingerprint sensor on the back of the phone. However, the placement of this sensor is awkward. The side-mounted or in-display fingerprint sensor has a better user experience than the back-mounted sensor.

However, this back ultrasonic fingerprint sensor is better than the Galaxy A71 on-screen fingerprint sensor. The optical sensor is slower and inaccurate. You have to place your finger at precisely the right place; otherwise, the fingerprint sensor would not recognize your fingerprint. It is frustrating.

Dual SIM:

Another great feature of Galaxy M31 Prime is dual Nano-SIM support. Therefore we can use two SIM at the same time. It’s beneficial because while conducting business, we can use a personal SIM and a business SIM. Therefore, we don’t need to carry two different phones.

3.5mm headphone jack:

Nowadays, most of the phone comes without a headphone jack. However, The Galaxy M31 Prime has a 3.5mm headphone jack.

FM Radio:

The M31 Prime has a built-in FM radio. The 3.5mm headphone cable works as the FM radio antenna.

Dolby Atmos:

The M31 Prime comes with the Dolby Atmos surround sound functionality. With the Dolby Atmos, you can experience moving audio sounds that flow all around you. However, to experience this, you have to use a headphone.

Huge Battery:

The M31 Prime has a massive 6000 mAh battery. With a single charge, this phone can smoothly go up to 2 days.

Top-Notch Security:

Galaxy M31 Prime is a very secure phone. It’s perfect for the “Bring Your Own Device (BYOD)” programs. Samsung Knox is integrated into this phone’s hardware and software. This multi-layered Knox security mechanism protects sensitive data from malware threats. Furthermore, the Galaxy M31 Prime has a built-in malware scanning and detection program. 

Galaxy M31 Prime has “Always On Display”:

The Galaxy M31 Prime has a useful feature – “Always On Display.” Using this feature, you can control music, watch time and date, view the calendar, view battery percentage, etc. even when the screen is turned off. 

Does Always-On Display drain the battery? The answer is no. The Always-On Display does not drain the battery because, in an LED, OLED, or Super AMOLED display, the display driver only turns on those pixels (LED) required to show text, image, or graphics related to AOD, while all other pixels (LED) turned off. Hence, It uses very little energy, and in our experiment on our Galaxy M31 Prime, we found that it only uses 1% battery energy per hour.

Ethernet Cable Connection:

You can use a USB C to Ethernet adapter to connect the Galaxy M31 Prime to an ethernet network. This way, you can get the internet on your M31 phone without WiFi.

Samsung Find My Mobile:

Every Samsung phone has a handy feature named “Find My Mobile.” If someone steals your phone or you lose it, with the help of this feature, you can track your Samsung phone online. Moreover, you can remotely lock it and delete personal data. You can even use “Find My Mobile” to unlock your phone if you forget your pattern, PIN, or password. To learn more, please visit

3 Months Free Amazon Prime Membership:

Samsung gives three months of free Amazon Prime membership with this phone. With the prime membership, you get unlimited free delivery, access to Prime video, ad-free music streaming, and more.

Useful Apps and Features in Galaxy M31 Prime:

In Galaxy M31 Prime, there are many useful apps. The following features of this phone are beneficial.

Secure Folder:

Every Samsung phone, including the Galaxy M31 Prime, has the “Secure Folder” feature. You can use the secure folder to protect your private photos, messages, apps, contacts, files, etc. from being accessed by others. It’s a great way to save and protect sensitive data on your phone.

Scan QR Code:

The Galaxy M31 Prime has a built-in QR code scanning feature. From the notification panel, you can activate this feature.

Game Launcher:

In Galaxy M31 Prime, there are many useful apps. Game Launcher is one of them. You can use the Game Launcher app to record your phone screen and system audio while you play an android game. A third-party screen recorder app can only record the phone screen, not system audio. So, this is very useful for YouTubers. 

Built-in Screen Recorder:

The Galaxy M31 Prime also has a built-in screen recorder app. So, you don’t need to install a 3rd party app to record your phone’s screen.

WiFi Direct Printing:

If you have a printer that supports WiFi, you can print anything from your M31 Prime phone without a WiFi router.

SmartThings, Smart View:

Suppose you have Samsung devices such as a Samsung smart fridge, TV, oven, dishwasher, Air conditioner, Samsung washing machine, Samsung dryer, etc. in your home. In that case, you can control those devices using your Galaxy M31 Prime with SmartThings and SmartView app. For example, you can wirelessly cast your phone screen onto your Samsung TV through the SmartView app. 

Samsung Kids:

Galaxy M31 Prime is perfect for kids. This phone has a parental control feature. While activated from settings, you can restrict access to apps and set their usage times. Moreover, you can also monitor daily usage time and activity history, including the history of frequently used contacts and browsing history. You need a PIN to deactivate “Samsung Kids” once it is enabled. So, don’t worry that your kid will disable it.

Data Usage Monitor:

The Galaxy M31 Prime comes with a built-in data usage monitor. It is a useful feature to keep track of data usage. 

Don’t be surprised to read that many apps use data in the background, even if the phone screen is off. To test in a Samsung phone, Goto Settings -> Connections -> Data Usage -> Data Saver. Now tap on “Allow unrestricted data usage.” Now in the top right corner, click on”⋮” and click on “Sort by allowed apps.” Now click again on”⋮”and “Show system apps.” You will get all the apps that use your phone’s internet data in the background. If necessary, you can turn off data permissions for apps individually by switching the toggle button.

Cons of Samsung Galaxy M31 Prime:

These are the drawbacks of the M31 Prime.

Exynos Processor:

The Galaxy M31 Prime uses Samsung’s Exynos 9611. This processor has a bad reputation for poor performance and lousy battery management. Qualcomm’s processor is far superior to the Exynos processor. Sometimes we see that the Exynos processor is getting a better benchmark score than similar specs Snapdragon processor, but the benchmark score is not everything. A processor, good or bad, depends on how it performs over the years. On long term usage, Exynos performs poorly.

To learn more about why Samsung uses Exynos processor instead of Qualcomm’s Snapdragon processor, click here.

Problems with AMOLED Display:

At the start of this article, we said that Galaxy M31 Prime has an AMOLED screen and praised it. However, the dynamic AMOLED screen has two drawbacks. 

  • One, AMOLED display loses its sharpness, crispiness, and vividness after a few years. The screen would look dull compared to a newly purchased M31 Prime’s screen.
  • Second, the AMOLED display has a screen burn issue. It arises when someone uses a single app extensively — such as Google Maps — for a long time. This extended usage would leave a ghost watermark of the used app imprinted on the screen permanently. 

No wireless charging:

The Galaxy M31 Prime does not have wireless charging functionality. 

Longer Charging Time:

Though Galaxy M31 Prime comes with a massive battery, charging this phone with the supplied 15W charger takes a lot of time. It takes more than 160 mins or 2 and 1/5 hours to charge from 0% to 100%. But this charging time is when the phone is new. After a few years, this phone will take even more time to recharge.

No headphones in the box:

Nowadays, it is a trend that the phone manufacturers do not give headphones in the box. The Galaxy M31 Prime, too, comes without a headphone in the box. You either have to use your old 3.5mm headphone or buy one from the market.

Not Water or Dust resistant:

The Galaxy M31 Prime is not IP67 or IP68 rated, which means the M31 Prime is not waterproof or dust resistant. Therefore, we ask you to be careful before you take your M31 Prime to the sea beach. It’s because water or sand will damage your phone.

No Dex Support:

The Galaxy M31 Prime does not have dex support. It is a handy feature that Samsung decided not to include in this phone. Dex is beneficial because, with the help of the Dex software feature, we can turn our phone into a trackpad for TV or PC, wirelessly connect to a monitor or TV for enhanced multitasking experience such as browsing the web like a PC, etc.

No ANT+ support:

The Galaxy M31 Prime does not have ANT+ support. Therefore, we can’t use this phone with health and fitness devices such as Fitbit.

No MHL Support:

Most of the Samsung phones support MHL to HDMI connections. However, Galaxy M31 Prime does not have MHL support. It’s a great feature that Samsung decided not to include in this phone.

MHL is a fantastic piece of technology that many do not know. MHL stands for Mobile High Definition Link. Using the MHL-HDMI cable, you can mirror your phone screen to any projector or TV. This feature helps you to give a presentation from the phone or watch a movie on the projector.

On Amazon, if you search “MHL to HDMI,” you will get thousands of results. This cable will help you transfer your phone screens display signal to an HDMI port. Before you buy your MHL to HDMI cable, please make sure which USB your phone supports, whether it is a micro USB, mini USB, or USB type C.

No Stereo Speaker:

The Galaxy M31 does not have a stereo speaker.

Mediocre camera:

We always say that one good camera is better than four bad cameras. Though M31 Prime has four main cameras, honestly, these cameras do not take great pictures. The pixel in cameras does not mean anything. A 12 MP DSLR camera takes far superior pictures than this 64 MP M31 Prime camera.

No Optical Image Stabilization (OIS):

M31 Prime cameras both on the front and the back do not have OIS.

Phones 4K video is awful:

The Galaxy M31 Prime has decent cameras and can record 4k video. However, a 4k video recorded on phones is inferior in quality than 4k videos recorded in a DSLR camera. Moreover, M31 Prime cameras are not Optically or gyro-stabilized. Therefore this phone is terrible for recording video while you walk. The M31 Prime camera will fail to stabilize the camera on every footstep, especially while recording 4k videos.

Non-removable battery:

The Galaxy M31 Prime has a non-removable battery. It is a disadvantage because the removable battery is useful in many scenarios. An old phone loses its battery capacity. So, it charges slowly but discharges rapidly, making the phone unusable for a practical purpose. 

Moreover, if Samsung OS detects the battery has become weak, it will slow down the processor to protect the battery from further deterioration. The slow processor will make a Samsung phone laggy. It is why an old Samsung phone lags and hangs. Replacing the old battery with a new one will solve all these problems. But, the M31 Prime battery is non-removable. So, when your Galaxy M31 phone gets old and becomes slow, you have to replace the phone itself.

Samsung Phone Becomes Hot:

Samsung phones overheat quickly. For the last ten years, Samsung failed to fix the phone overheating issue. Samsung acts like this issue does not exist.

If you play any video game, run YouTube, Netflix, or run an app that uses a lot of processing power — such as a video editor — the phone would become so hot that it would be impossible to hold it in hand. When the phone overheats, your phone will become slow and laggy. Furthermore, your Galaxy M31 Prime can also overheat while recording a 4k video with the phone cameras.

This article describes in depth why Samsung phones lag and hang.

No NFC and No Samsung Pay:

The Galaxy M31 Prime does not have NFC built-in. Therefore we can’t use this phone to pay in stores using Samsung Pay.

Samsung BloatWare:

Though I love Samsung Phones, I’m not too fond of their software. Samsung always ships its phone with a lot of bloatware pre-installed. M31 Prime is not different, either. This Galaxy M31 Prime comes with more than 30 preloaded apps. There are several duplicate apps too. 

You may think it’s not a big deal for your M31 Prime because you have plenty of remaining storage capacity left for you. But the problem with pre-installed bloatware is that those apps have some root permission to access your user data that 3rd party apps don’t have. 

Moreover, A pre-installed app can run several processes in the background, which you will never be able to detect. For example, the Facebook app runs several processes in the background that consume a lot of battery and processing power. It not only limits the battery but also prevents other apps from running smoothly, such as Maps. It is why Google maps crash if you have Facebook installed. 

Duplicate Apps in Galaxy M31 Prime:

Samsung is infamous for shipping its phone with duplicate apps. Galaxy M31 Prime is not an exception, either. The following are similar apps in a Galaxy M31 Prime.

Duplicate Assistant:

  • Google Assistant.
  • Samsung Bixby.

Duplicate App Store:

  • Google Play Store
  • Galaxy Store

Duplicate Music App:

  • YT Music
  • Spotify

Duplicate Browser:

  • Google Chrome
  • Google (Search)
  • Samsung Internet

Duplicate Online Storage:

  • Google Drive
  • Microsoft OneDrive

Numerous Email Client:

  • Gmail
  • Samsung Email
  • Microsoft Outlook

Duplicate Photo manager:

  • Google Photos
  • Samsung Gallery

Pre-installed Amazon Bloatware:

  • Amazon Shopping
  • Amazon Prime Video
  • Amazon Prime Music
  • Kindle
  • Audible

Pre-installed Microsoft Bloatware:

Samsung preloads every Galaxy M31 Prime with the following Microsoft apps.

  • Office Mobile
  • Microsoft One Drive
  • LinkedIn
  • Microsoft Outlook

3rd Party Bloatware:

There are apps on Galaxy M31 Prime, which are not necessary at all times. It could be beneficial for some, but not for all people. Moreover, anyone can download these apps from the App store. So, there’s no point in pre-installing the following apps.

  • Samsung Members
  • Facebook
  • Netflix
  • Samsung Notes
  • My Galaxy
  • Samsung Global Goals
  • Dailyhunt
  • Samsung Max
  • Samsung shop
  • Snapchat
  • LinkedIn

Infuriating disclosure by Samsung:

Samsung is the king of bloatware. These extra and redundant apps severely limit the performance of the galaxy M31 Prime. However, Samsung denies taking any responsibility for performance issues caused by all the third-party apps they pre-install on their phone. To learn more, please read the user manual that comes with this phone.

Not suitable for gaming:

The Galaxy M31 Prime performs poorly while playing games. Though this phone comes with a software feature named “Game Booster,” this phone can’t run process-intensive games smoothly. 

Plastic Back:

This M31 Prime has a plastic back. So, it does not feel premium at all. Moreover, a plastic back will chip its paint after a few years. At that point, this phone will look very ugly. However, if you use a phone case, you can avoid this issue.

No Extended Software Update:

Apple provides software updates to all of its iPhones for up to 60 months. They never abandon their phones. But Samsung stops giving any software update after only 24 months of release. It only applies to flagship phones. The Galaxy M31 Prime is not a flagship phone. Therefore, Samsung would not provide any software updates after 12 months. We know this fact from our experience.

Only 6GB RAM:

The Samsung Galaxy M31 comes with 6GB RAM. We consider it a disadvantage because 6GB RAM is not enough for the Android OS with One UI 2.0 and with all those bloatware pre-installed. While new, your phone will open apps blazing fast; however, this RAM would choke to run different apps after a few years.

Useless Bixby:

Samsung is terrible at software. Bixby is the prime example. Most of the time, it does not work. Moreover, Android Assistant is far superior to Bixby. Still, Samsung ships this unnecessary software with every phone. 

Samsung Phones Don’t Last Long:

We all know that Samsung phones don’t last long. A new Galaxy M31 Prime will operate smoothly. But after only a few years, this M31 Prime will become very slow and laggy.

Samsung phones have a low resale value:

We know that no one sells their used phone. However, just in case you need to sell your phone, iPhones have a better resale value than Samsung phones. 

Frequently Asked Questions.

Does the Samsung M31 Prime come with a headphone?

No, Samsung does not provide a headphone in the Galaxy M31 Prime box.

How to activate Developer Mode in Galaxy M31 Prime?

You need to enable the “Developer options” before developing apps and testing on the M31 Prime. To activate it, go to “Settings” then click on “About phone.” Now, click on the “Build number” 7 times to enable “Developer options.” Once activated, the option will appear in the “Settings” main menu.

How to force restart Galaxy M31 Prime?

If your M31 Prime is frozen and unresponsive, press and hold the Side key and the Volume Down key simultaneously for more than 7 seconds to restart your phone.

In short, Galaxy M31 Prime’s pros and cons:

6.4 inch 1080 x 2340 pixels Super AMOLED screen.Exynos Processor
Expandable StorageNo Wireless charging
Fingerprint SensorNot waterproof
Dual SIMNo headphones in the box
3.5 headphone jackNo Dex support
FM RadioNo ANT+ support
Dolby Atmos surround soundNo NFC
6000 mAh batteryNo MHL support
Always-on DisplayNon-removable battery
Free Amazon Prime membershipNo extended Software support
Samsung Bloatware


The Galaxy M31 Prime is a low priced, decent phone. However, the disadvantages of this phone are more than its advantages. Therefore, we think this phone is not worth it.