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Oukitel K4000 Plus Review - A Heavy Surprise In A Small Package

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Oukitel is a China-based smarphone conglomerate that has been providing very interesting offerings in the global market. With the K4000 Plus, Oukitel aims to offer a entry to midrange smartphone focused on the delivering durability, security, and a very long battery life.
 Oukitel K4000 Plus Review
Meet Oukitel K4000 Plus

Oukitel K4000 Plus Specs

Display: 5 Inch HD IPS 1280 x 720 resolution at 294 ppi
CPU: 1.3 GHz 64 Bit MT6737 quad core processor
GPU: Mali T720
RAM: 2 GB
ROM: 16 GB via micro SD card slot up to 128 GB
Back Camera: 8 MP f/2.2 w/ AF and LED flash
Selfie Camera: 2 MP f/2.8
Battery: 4,100 mAh
OS: Android 6.0 Marshmallow w/ Oukitel OS
Connectivity: WiFi, 3G, HSPA+, LTE, Bluetooth 4.0, FM Radio, GPS, A GPS, dual SIM
Sensors: light, gravity, proximity
Others: Fingerprint sensor
Dimensions: 144.5 x 71.6 x 10.8 mm
Weight: 215 g
Price: USD 89.99 (Under PHP 5K)

Disclaimer: This is a seeded unit from Oukitel for our constructive review


Unboxing / Accessories

Even spidey wants to know what's inside
Even spidey wants to know what's inside

The box includes a 2A charger, a micro USB data/charging cable, and a silicon soft case. All in all pretty standard case but we would have wanted earphones to be included.
The full kit
The full kit

Build Quality / Design

Solid body
Solid body

So lets address the elephant in the room. This is a bulky phone. It is a think 215 grams that is about 10 mm thick handset but do not let that sway you away. These numbers are normal for phones that carry this much battery power.

The build feels very durable!

We even stumbled on a video where the phone was used to punch nails on wood. Something we do not recommend you do but it goes to show how strong this phone is.
Non-removable battery inside :)
Non-removable battery inside :)

The back panel can be removed to show the SIM and SD card slots. Take note that though the battery is exposed, it is non-removable.

It features a plastic removable back panel, aluminum bumpers on the sides and one very tough Asahi Glass. The front showcases the fingerprint scanner / main button, the 2 MP front camera and the 5 inch display.
The 3.5 jack is on top
The 3.5 jack is on top
Mic and charging port below
Mic and charging port below
Power button and volume controller on the left panel
Power button and volume controller on the left panel

The back of the phone has the rear camera on top. The Oukitel logo and the speakers at the bottom. The placing of the speakers is a bit on the off side as it may get will get muffled if you're used to holding your phone a certain kind of way or you put it down face up on a flat surface.

The phone is comfortable to hold in general.

Display Quality

Good screen!
Good screen!

The display of the K4000 Plus has good brightness and is 5 point multi-touch capable. the 5 inch size may make it a tad smaller that what people are used to these days but this makes it more pocketable, and is definitely an ample size given the resolution.

It does not have the depth and vividness that most people would expect from an HD display. The K4000 Plus display is above average at best (for the price) but do note that this is not the department where this phone aims to excel at.

Audio Quality

The handset has good audio. It isn't exceptional but it will do the job. Do not expect to much power on the speakers.

Oukitel uses 3D sound that amplifies and cleans up the sound and seems to attribute to the output having decent quality. 

Microphones are good for calls on Skype and Facebook. having a slightly smaller frame may have helped as the phone fits the side of the face better than other larger sized screens.

Battery Life

Good enough battery score
Good enough battery score

With a 4100 mAh it is expected for the K4000 Plus to have a great battery life and it did not disappoint.

Strong battery performance!

From PC Mark benchmark, it scored 9 hours 52 mins which is good. Now, Battery life does vary on the usage. With minimal usage, the phone lasted more than 30 hours.

With casual use: a few phone calls, playing a few small scale games, and some Skype, the phone will last throughout the day.

With continuous screen time, the battery lasted approximately 6.5 hours.

Needless to say, no one should not be disappointed with the battery life of the K4000 Plus.

Camera

8 MP camera behind!
8 MP camera behind!

At the back, the K4000 Plus has an 8 MP f/2.2 camera with autofocus and LED flash. The quality is average at best. It has a selfie, HDR, panoramic, and beautify modes.

The UI may be a bit bland but in good lighting, the shots are good enough to be appreciated.It also has a bits and pieces that you can tweak like the exposure, white balance, and color effects.

It is not the whole pro mode that many would want to see but these setting basically adds filters to your shots. The HDR mode helps a lot but it does make it tougher to handle as it is very sensitive shakes.

Camera quality is acceptable for the very low asking price. It has good exposure, well balanced colors and good depth. It could just be grainier and lacking and detail, but again, stills are forgiveable for the price.

Rear Camera Samples

Rear camera sample in daylight
Rear camera sample in daylight
Camera suprisingly captures light very well
Camera suprisingly captures light very well
Macro shot
Macro shot
Close up shot
Close up shot
For mid lighting, the camera would suffice
For mid lighting, the camera would suffice
Indoor sign shot
Indoor sign shot

At the front, is a 2 MP f/2.8 camera that is surprising in performance especially if the HDR is enabled. It is able to get good levels of color and lighting in daylight. Lowlight shot pose a bigger challenge though.

Overall, the camera does a good enough job for an entry level handset. Not the best around though.

Selfie Camera Samples

Indoor selfie with daylight
Daylight selfie
Indoor selfie with daylight
Indoor selfie with daylight
Beautify effect
Beautify effect

Note: We'll add lowlight camera samples later.

Performance

Antutu and Geekbench scores
Antutu and Geekbench scores

The K4000 Plus is powered by a Mediatek MTK6737 Quad Core 1.3 GHz Cortex-A53 with 2 GB of RAM which is adequate enough for casual gameplay and some multi tasking on the go.

As much as can be expected from a entry-mid level phone, benchmark score are not the highest we have seen.

Consider that the MTK6737 is a relatively entry level chip that would work well on day to day tasks with some moderate gaming on the side. Though playing high requirement 3D games may cause some lags. 
The UI
The UI

It runs an its own Oukitel OS launcher running on top of Android 6.1 Marshmallow. The Oukitel launcher does not have any app drawer and a floating shortcut button for faster task changes. What we also like about this handset is that the floating shortcut button is that it can be customizable.

However, there is an issue when setting the display brightness to auto, the screen tends to flicker continuously until you figure out to remove the auto settings with a flickering screen.

You have a lot of options with the security settings!

Oukitel released the K4000 Plus with a focus on security and it has a privacy system and an property system that takes care of your security needs. It has a privacy system that is on a separate home screen when enabled.

This is where you can add private images, videos, apps, and other files, that you want to be secured. The property system on the other hand serves an incognito user which you can use for your financials and apps that you want to be untraceable.

It has a lot of optimization apps that are really good to use and if utilized properly may prolong the battery even further. It even has a freezer app where you can put in apps that you do not normally use. This comes in specially useful for the bloatware apps that you can't uninstall. 

The rest of the telephony experience was just fine.

Pros - Simple sturdy build, amazing battery life, good performance for the price, has some good optimization apps
Cons - Still running with Marshmallow 6.0, camera could be better, screen flickers when lights are set to auto, not available locally

Verdict

Here is the catch: If you are looking for a sturdy phone with decent everyday performance, without the need for a great camera, and if your on a budget, this is the gizmo for you.

It works well as a work phone given its privacy and security settings or a secondary phone. The K4000 Plus offers great durability, a surprising performance given the hardware, and some security features that only a few other phones in the price range can boast about.

Note: This phone is available at AliExpress.

Build / Design - 3.75
Display - 3.5
Audio - 3.75
Battery - 4.5
Camera - 4
Performance - 4
Average - 4 / 5
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