Jesy J9S Review

A new manufacturer by the name of Jesy enters the ring of the outdoor smartphone arena and delivers with the J9S the first IP69 certified smartphone that we had in our test lab. The smartphone wants to score points with its Helio P10, a lot of RAM and large memory. What the Jesy J9S exactly, you’ll learn in the review.

There are two versions of Jesy J9S. Once the normal J9S and tested by us J9S high end version. The standard version has a weaker processor, supports fewer standards and is not equipped with all high end version sensors.

Buy JESY J9S at for $311.46


Jesy wants to distance himself from the boring design of many other outdoor smartphones, which is why the J9S looks slightly “spacy” and modern. However, it does not get much smaller and with 164 x 85 x 17 mm at the widest points and 295 g weight is not a flatterer. Nevertheless, thanks to the shape of the back, the smartphone is better in hand than expected.

The entire body of the Jesy J9S is made of poly carbonate and is covered with a rubber coating to protect the smartphone from shocks. This also works in practice and so the J9S survived several crashes without the slightest damage. With the IP69K certification, it is officially protected from bumps, the ingress of dust, permanent submersion and even from water from the high-pressure cleaner – so in the washing machine with it. The washing process including skidding also left no visible marks on the smartphone.

Rubber covers on the top and bottom ensure that no water gets into the headphone input or USB port. The cover of the SIM / MicroSD card slot is located on the back and is not screwed. Instead, the shutter is depressed with the supplied screwdriver, which opens the cover. This is also protected by a seal from water.

On the backside are next to the fingerprint sensor also the dual LED flash, the barometer sensors and the camera, which fits with its triangular shape to the design of the mobile phone. On closer examination, it is noticeable that there are small rubber covers in all four corners. Underneath are the screws for the back. These can not be solved with the supplied Phillips screwdriver, but with a 5x Torx. If you already exult inside, because a removable backside often brings a replaceable battery, I have to disappoint you. The backside can not be easily removed, because it was glued to the housing very well. Anyone who tries to open the case by force, runs the risk that the smartphone is no longer tight afterwards.

Power button and volume rocker are located on the right side, while on the left side an SOS button and PTT button are housed. This brings me to the first negative aspect of the Jesy J9S – the keys are extremely difficult to press. Even for an outdoor smartphone, they are too tight.

On the top is next to the headphone jack an infrared transmitter. On the bottom are the USB-C connector and a small loop. Above the display are the earpiece, light and proximity sensor, the front camera and an RGB notification LED. Below the display are the 3 soft-touch buttons , which are illuminated white and the speaker of the smartphone. The speaker is mainly one thing – LOUD. Up to a certain volume, the sound pattern is still acceptable, but from 70% it is unfortunately distorted and tinny. But the included in-ear headphones are not only stylish, but also very good quality. Strong bass, good mids and pleasant highs.


The 5.5″ Full HD display of the Jesy J9S resolves with 1920 x 1080 pixels. The picture is crisp and the colors are strong. If you would like to customize the display yourself , you can do so with MiraVision. The panel processes up to 5 points of contact simultaneously and responds quickly to every touch. In addition, it even reacts great on wet fingers, but this sensitivity also leads to inputs through “water drops” that can ever start one or the other app. The glove mode also works great, which I have not experienced so far in this form. Even with thick leather gloves you can navigate through the system. Only writing turns out to be a bit problematic because the smartphone reacts tough here and you do not land so well with gloves on the letter. The display is protected by Gorilla Glass 4 , which I could not miss any scratches by usual means.

System and Performance

Jesy is working on a Mediatek MT6755, better known as Helio P10. Its 8 cores clock up to 2 Ghz and are supported by a Mali T860. Furthermore, the mobile phone 4GB RAM available, which delivers a good speed with about 5 GB/s. The 64GB large internal memory with 212/152 MB per second read / write speednot bad either. Based on the numbers can already be seen that the smartphone is more in the upper middle class plays. So standard tasks like Youtube, WhatsApp, Facebook and Co are no challenge for the Jesy J9S. Even games with medium requirements run smoothly and smoothly on the outdoor smartphone. Even the fast and lush RAM is a very good condition for multitasking.

On the Jesy J9S runs a pretty clean Android 7.0. No flash themes or unnecessary bells and whistles were added by Jesy. Only Zello, which is needed to use the PTT function, and a remote control app are preinstalled. The navigation is smooth and there were no hangers or crashes during the test phase. In addition to the already mentioned glove mode provides the smartphone with the other additional functions such as gesture control and off- screen gestures . As usual, the SOS feature can create one or more emergency contacts, which will be called and notified when the mode is activated.

The very hard-to-press buttons make the SOS mode virtually useless, as in a serious injury, the injured party will probably no longer be able to hold down the button as long as possible. Otherwise Jesy delivers here but a clean system that performs well.


The main camera of the Jesy J9S triggers with 16MP and shoots quite passable pictures. Although the camera in the outdoor squad is not so much value, Jesy delivers quite good results here. The focus and the trigger are usually fast, the pictures in good light relatively colourfast. In rainy weather and low light both the focus is weaker and the colors are not so strong. The sharpness could also be a bit better and not so artificial. On closer inspection, artifact formation occurs and the images become grainy. The dual-LED flash supports the camera in low light conditions, but we all know how strong this support looks in reality. The main camera shoots so acceptable photos and is definitely useful for one or the other snapshot. There is still a shortcoming. As scratch-resistant as the normal display may be, the glass above the lens is so vulnerable. Just by the normal use and wearing in the trouser pocket scratches have arisen that lead to malfunction of the focus when shooting with direct backlight.

The front camera resolves with 8MP and delivers a comparatively weak result. Even stronger artefact formation and paler colors make everything seem unreal. For one or the other selfie OK, but not for more.


In this category, outdoor smartphones often reveal their true strengths. Also the Jesy J9S can score here. So the device works on all common 2G, 3G and 4G frequencies and the important for us Volume 20 is on board. The reception was always outstanding and even on the train ride I never had such a stable connection as with the Jesy. The quality of the calls is just as positive, so I am crystal clear and understand my opponent without disturbing noise. The phone works with two micro SIM cards, If you only have Nano-SIM cards, you do not have to despair, because Jesy wisely includes two adapters from Nano to Mico-SIM. When using two SIM cards at the same time, a MicroSD card can still be used as a memory extension, so the mobile phone does not have a hybrid slot.

The GPS is also a strength of the outdoor mobile phone. The fix is ​​within a few moments and the device navigates reliably without deviation – both on foot and by car. Dual band Wifi , NFC and Bluetooth 4.0 are also on board and work perfectly. Even otherwise, the phone has an absolute full equipment. So there are in addition to the 3 standard sensors (nutrient, light and acceleration sensor ) an infrared sensor , a temperature sensor , an air pressure sensor , a gyroscope , an electric compass and last but not least the fingerprint sensor, Incidentally, this works well and unlocks the phone safely in a few seconds.

Also gyroscope, barometer and infrared sensor perform their service easily. Only the temperature sensor I could elicit no data. However, this is also not explicitly stated by Jesy, which is why there may only be support for such a sensor. Thanks to the infrared sensor, the J9S could be conveniently used as a remote control for the TV.


The battery of the Jesy J9S is indicated with 6150 mAh, which I can confirm so far. Also, the value of the battery benchmark of 12h 54m supports the specified capacity. By contrast, I was surprised by the loading speed. The power adapter charges the battery with up to 12 V at 1.5A. Nevertheless, the smartphone needs a good 3 hours until it is fully charged. Despite the quick-charge technology, loading takes longer than usual. This also supports wireless charging.

So the battery will easily take over two days of use, especially if the smartphone is used only for casual tasks, since the processor uses only 4 cores actively – this saves power. This should not be a problem with economical use and the third day. However, that the battery needs so long to load, bumps up briefly bitter.

Buy JESY J9S at for $311.46


Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.