A new manufacturer named Jesy wants to compete in the outdoor smartphone segment and presents the J9S, the first IP69K certified smartphone to be tested in our lab. The smartphone wants to score with an Helio P10, a big RAM and big storage. If Jesy J9S could succeed, you’ll find out in the review.


Jesy J9S is available in 2 versions. The normal J9S and the J9S high-end version, which is the one we’ve tested. The standard version has a less powerful processor, supports fewer standards and does not offer all the sensors the high-end version does. For further details have a look at this table.

jesy j9s versionen

Design and build quality

Jesy wants to differ from the boring design of many other outdoor smartphones, which is why J9S looks very modern. It is not smaller than most other outdoor phones, and with its dimensions of 164x85x17mm and a weight of 295g, the device is quite big and heavy. However, the smartphone feels a lot better while holding it in the hand than I thought before. The reason for that is the form of the rear.

The entire casing of Jesy J9S consists of polycarbonate and is covered with a rubber layer to protect the smartphone from bumps. The protection works very well in practice and the J9S survived several falls without any harm. Being IP69K certified, it is officially protected from bumps, dust, permanent immersion underwater, and even water from a pressure washer – so you can also put the smartphone in the washing machine. Washing the smartphone (spinning included) did also not leave any traces on the phone.

Jesy J9S Vorderseite Rückseite 2

At the top and at the bottom, you find rubber covers that prevent water from getting into the headphone jack and the USB port. The cover of the SIM/Micro-SD card slot can be found on the rear and is not screwed on. Instead, you have to press down the clasp with the provided screwdriver, which then opens the cover. The cover is also protected from water by a seal.

Jesy J9S Design und Verarbeitung 2 Jesy J9S Design und Verarbeitung 4

On the rear, next to fingerprint scanner and dual-LED flash, you find the barometer sensors and the camera, which fits well in the smartphone’s design with its triangular form. Looking closely, you can see small rubber covers on all 4 edges. Beneath them, you find the screws for the rear cover. You cannot lose them with the provided Philips screwdriver, you’ll need a 5-Torx screwdriver. Those hoping for a removable rear and replaceable battery will be disappointed: the rear cannot be removed without a lot of effort, as it was glued to the casing very well. If you try to open the casing with force, you risk that afterwards the device is not protected against water anymore.

Jesy J9S Design und Verarbeitung 1 Jesy J9S Design und Verarbeitung 3

The power button and volume control buttons are located on the right; on the left side, you find an SOS and a PTT button. This is the first weak point of Jesy J9S: the buttons are extremely hard to use. Even for an outdoor smartphone, it takes too much effort to press them.

Jesy J9S Sim WErkzeuge Test

At the top, you find the headphone jack and an infrared-sender. At the bottom, there are the USB-C connection and a little loop.

Earpiece, light and proximity sensor, front camera and an RGB notification LED are located above the display. Below the display, you find the 3 soft-touch buttons (illuminated in white) and the speaker.

The speaker has mainly one quality: it is LOUD. Up to a certain volume, the sound is acceptable, but from 70% onward, the sound is distorted and tinny. The provided In-Ear headphones, however, are not only stylish but have a high quality, too. They provide strong basses, nice middles, and pleasant heights.

Jesy J9S scope of delivery

Jesy J9S Lieferumfang

Out of the Box, you get many accessories:

  • Headphones
  • USB-cable
  • Screwdriver
  • SIM-card adapter
  • Short operating instructions
  • Power supply unit


Jesy J9S Display Test 2 Jesy J9S Display Test 1

The 5.5-inch full-HD display of Jesy J9S has a resolution of 1920x1080pixels. The image is pin-sharp and colours seem strong. Those who want to customize the display can do so by using MiraVision. The panel registers up to 5 points of contact simultaneously and reacts fast at any touch. It even reacts well if you have wet fingers, but this sensibility can also cause accidental actions started by “water drops”. The glove mode also works perfectly, which I never experienced before. Even with thick leather gloves, you can navigate through the system. Typing, on the other hand, is a bit difficult, as the smartphone reacts slowly here and you’ll have trouble to hit the right key with gloves on. The display is protected by Gorilla Glass 4, which successfully prevented the display from scratches.

System and performance of Jesy J9S

jesy j9s a1sdJesy J9S houses a MediaTek MT6755, better known by the name Helio P10. The processor’s 8 cores clock at up to 2GHz and are supported by a Mali T860. Furthermore, the phone offers 4GB of RAM, which has a nice speed of 5GB/s. The 64GB main memory has a nice reading/writing speed of 212/152MB/s as well. Looking at the numbers, you see that the device is located in the upper middle class. Standard tasks like YouTube, WhatsApp, Facebook & Co do not pose a problem for Jesy J9S. Games with medium demands also run smoothly on the outdoor smartphone. The big and fast RAM is well prepared for multitasking.

Antutu Result Geekbench Multi Result Geekbench Single Result

Jesy J9S houses a relatively clean Android 7. Jesy didn’t add any flashy themes or unnecessary knick-knack. The only pre-installed apps are Zello, which is needed for the PTT function, and a remote control app. Navigation happens fluently and there were no delays or crashes during the test phase. Besides the already mentioned glove-mode, the smartphone also offers all other additional functions like gesture control and off-screen gestures. With the SOS function, you can create one or more emergency contacts, which are called and informed when the mode is activated.

jesy j9s android jesy j9s malewarebytes jesy j9s settings

The hard-to-use buttons, however, make the SOS mode almost useless, as a heavily injured person probably won’t be able to press the button as long as it is required to activate the function. Apart from that, Jesy provides a nice and clean system that works well.


Jesy J9S’s main camera has a 16MP resolution and takes quite decent pictures. Although most outdoor manufacturers do not focus on the camera, Jesy does a good job here. Focus and trigger mostly work fast, the pictures are relatively colourfast in good light conditions. In rainy weather and low light, the focus is weaker and the colours are not so strong anymore. Sharpness could be better and not as artificial as it seems. looking closely, the pictures form artefacts and get grained. The dual-LED flash supports the camera in low light conditions, but we all know how this support looks like in reality. The main camera takes acceptable pictures and is definitely useful for one or the other snapshot. However, there is one niggle. As scratch-resistant as the display glass might be, the glass of the camera lens is definitely not. Normal use and carrying the phone in the trouser pocket caused scratches, which cause malfunctions of the focus when taking photos against the light.

The front camera has a resolution of 8MP does a rather bad job. Even more artefacts are formed and pale colours make everything seem fake. The camera is suitable for one or the other selfie, but nothing more.

Connectivity and communication

In this category, most outdoor smartphones present their strong points. Also Jesy J9S can convince here. The device supports all 2G, 3G and 4G frequencies. The reception was always outstanding and even while being on a train I had such a stable connection with the Jesy device as I’ve never had before. Voice quality is also good, my voice, as well as the caller’s, were transmitted clearly and there were no background noises. The phone works with 2 Micro-SIM cards. Those using Nano-SIM cards have no reason to despair, as Jesy provides 2 adapters from Nano to micro-SIM. The smartphone has no hybrid-slot, which means you can use 2 SIM cards as well as a Micro-SD card to expand the storage.

jesy j9s gpsGPS is another strong point of the smartphone. The fix happens within a few seconds and navigation works perfectly as a pedestrian as well as in the car. Dual-Band WiFi, NFC and Bluetooth 4.0 are also available and work well. The device provides a full equipment. Apart from the 3 standard sensors (proximity, light and acceleration sensors), the phone offers an infrared-sender, a temperature sensor, an air pressure sensor, a gyroscope, an electric compass and the fingerprint scanner. The latter works excellently and unlocks the phone within a few seconds.

Gyroscope, barometer and infrared-sender also work perfectly. Only the temperature sensor did not provide me with data. However, Jesy does not explicitly name such a sensor, which is why maybe the phone only provides a support for the sensor. Via the infrared-sender, I could use Jesy J9S as remote control for my TV.


jesy j9s pcmarkAccording to Jesy, the J9S houses a 6150mAh battery, which I can confirm. The result of the battery benchmarks (12h 54m) also supports the claimed capacity. I was however surprised at the charging time. The power supply unit charges the battery with up to 12V with 1.5A. But it still takes 3 hours to fully charge the smartphone. Despite quick-charge technology, it takes longer than usual. Wireless charging is however supported.

Battery lifetime Result Unit: hours

The battery easily gets you through 2 days of use, especially if you use the device mainly for basic tasks, as the processor then only uses 4 cores actively – this saves energy. With economical use, you can also get a third day of run time. The long load time, on the other hand, is a small niggle.

Conclusion and alternative

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The J9S in the high-end version is currently the best outdoor smartphone on the market. Jesy did a great job and there are barely any weak spots. In terms of the outdoor qualities, J9S is definitely among the top devices. In addition, you get a lot of power and a big storage – a great overall package. It’s a pity that the camera lens is so sensitive to scratches, but nevertheless, the smartphone is a champion!

  • Design and build quality 100 %
  • Display 100 %
  • Performance 80 %
  • Camera 100 %
  • Communication and connectivity 70 %
  • Battery 80 %

Price comparison

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*Prices include shipping and toll. Intermediate changes of prices, ranking, delivery time and costs possible. Prices last updated on 21.01.2019

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