rugged smartphone with a battery of large capacity
Protection standard
Li-Pol, 5000 mAh (built-in)
Operating system
Android™ 7.0
MTK6737T , 4 core, 1,5 GHz
5'' IPS HD (1280*720) Corning Gorilla Glass 3
View all specifications
Out of production

X-treme PQ28 smartphone runs on the quad-core MediaTek processor MTK6737T with 1.5GHz clock frequency, running Android 7.0 OS (Google Mobile Service Certification) and Mali-T720 GPU graphic core. Pure Android and Google Mobile Services certification allow users to be sure that the system and smartphone have been prepared in accordance with Google’s recommendations by manufacturer.

On the board of device is 2GB of RAM and 16GB of ROM. You can increase additionally phone’s memory by using up to 32GB microSD cards.

A built-in rugged Li-Pol battery of 5000 mAh allows the smartphone to operate autonomously for long time. You may listen to music and the same time communicate via messengers, play online games or watch movies for all day, and while not saving on screen’s brightness. The provided function as PumpExpress shall help you quickly recover the lost percentages of battery charge.

X-treme PQ28 smartphone is equipped with color screen with 5” diagonal, IPS matrix of HD format with 1280×720 pixel resolution.  The screen is protected by glass of increased resistance to scratches called Gorilla Glass 3.

And usually, the smartphone has a high degree of protection against water and dust in accordance with IP68, which allows you to plunge the phone into water to a depth of 1.5 meters (up to 30 minutes).

X-treme PQ28 supports the operation of two nanoSIM cards on the GSM network, or one nanoSIM and one microSD card.

The smartphone works on the Internet network thanks to the presence of WiFi-module and supports the operation of high-speed 3G/4G networks, and the built-in GPS module allows you to use the smartphone as a navigator. As well as you may use the built-in Bluetooth 4.0 in order to transfer and change data.

X-treme PQ28 is equipped with a main Sony IMX219 camera of 8MP with a wide range of opportunities: autofocus, face recognition, panoramic recording, and sequential recording. A front camera of 2 MP is completely enough to take high-quality and bright selfies.

In addition, X-treme PQ28 has the following useful functions and opportunities: light sensors, proximity, orientation, accelerometer, gyroscope, magnetometer (the latter allows you to install “the Compass” application for orientation on the ground without GPS), flashlight, FM radio, MP3 player, gesture control function on the off screen. As well as the smartphone quickly connects to peripherals devices such as mice, keyboards (including wireless), USB flash drives thanks to OTG function.

X-treme PQ28 smartphone will become a real assistant and reliable companion for lovers of both active life and active leisure. Moreover, for people of those professions that are constantly in contact with water, dirt, dust, snow.

X-treme PQ28 is always ready to operate in almost any complicated conditions.

Protection standard
IP68 (* 6x-protection against dust, sand and dirt particles, * x8- protection for long (up to 30 minutes) immersion in water to a depth up to 1,5 m.) Full waterproof .The device can work in submerged condition). This standard does not provide shock-proof. Due to additional seals and strong attachments, the phone has increased vibration resistance, but requires caution in use.
Operating system
Android™ 7.0
certified by Google Mobile Service
Mediatek MTK6737T, 4 core, 1,5 GHz
SIM type and quantity
2 ( Dual nanoSIM or nanoSIM+microSD)
GSM 850 900 1800 1900 MHZ;
WCDMA 850 1900 2100 MHZ
5" IPS, HD (1280x720)
Gorilla Glass 3 - high resistance to scretches
ROM: 16 GB
Mamory slot
microSD (up to 32 GB)
main : 8 Mpx
front : 2 Mpx
Location detection technology
Wi-Fi 802.11 b/g/n, WiFi Hotspot, WiFi Direct
Screen gestures control
Quick charge function PumpExpress
OTG support with extra recharge function for other devices
Li-Pol, 5000 mAh (built-in)
- talk-time mode up to 14 hours
- standby-time mode up to 14 days
- video viewing mode via WiFi up to 14 hours in brightness comfortable for viewing (without any SIM-card)
Headphone Jack
3,5 mm
Connector for charger
145х75х14 mm
217 g
Housing color
In the box
Smartphone X-treme PQ28, USB power adapter, USB cable, clip, Wired headset, Quick Start Guide (UA/EN), warranty card
18 months
Sigma mobile reserves the right to change the divice technical specifications and configuration without notice.
User manual (UA)
User manual (EN)
Conformity certificate (UA)

Sigma mobile company guarantees a high quality and faultless functioning of their devices upon conditions of careful usage and considerations of exploitation rules.

After the expiration of device’s service term, we advise you to contact the Authorized Service Center for preventive maintenance and receiving recommendations for the further exploitation of device. In order to prevent possible misunderstandings, it is preferable to keep the documents that are attached to the device upon its sale (sale receipt or cashier’s receipt, instruction of exploitation, warranty card) during the service term. A warranty card establishes warranty liable for device to the extent, provided by the Law of Ukraine On protection of consumer’s rights.

Warranty conditions

  • A warranty provides free repair or replacement of the device during the warranty term. Warranty service is only provided in the presence of a valid warranty card and fiscal check.
  • The renewal of software is a technical maintenance of the product and is not considered as repair and thereforeis not a valid reason for a replacement or a refund;
  • The Periodic service of device (replacement of batteries, cleaning, etc.) is carried out by request for an additional fee.
  • The warranty term for main devices and accessories is set by Sigma mobile with reference to from the date of device’s sale (look at Table 1).
  • Service term is established by Sigma mobile company in reference to the date of the device’s purchase (look at Table 1).
  • Warranty service is provided exclusively at  Authorized Service Centers in Ukraine. The sheet of service centers may be changed



Warranty terms

Service term

Mobile phones series X-treme Main deviceEighteen months

Three years

Mobile phonesMain deviceTwelve months
TabletsMain deviceTwelve months
Action camerasMain deviceTwelve months
Bluetooth headsetsMain deviceTwelve months
Accessories and batteriesRechargeable batteries (including built-in types)Six months

Two years

Memory cards, cables, headsets and other accessories and parts, which don’t requare to disassemble the mobile device in order to replace.

One month

Table 1

The manufacturer shall not bear warranty obligation regarding the device in the following cases:

  • Violations of rules and conditions of exploitation, adjustment, installation of device, described in the User’s Manual and other documentation, which is transported to the consumer in the complete set with the device;
  • If mechanical damages have occured after the transfer of the device to the consumer;
  • The ingression of inappropriate items, liquids, insects, etc. inside the device during usage;
  • Device’s operation in conditions of excessively high or low temperature, surrounded by high humidity, high dust content;
  • Making schematic-technical, design or software changes, not approved by the manufacturer;
  • Repair or modification of device, performed by unauthorized persons;
  • If the damage is caused by the use of non-standard and/or non-qualified expandable materials, charging devices, spare parts, batteries, electronic media, software products that were not supplied or recommended by the manufacturer;
  • If the damage (defects) is caused by the action of computer viruses or similar programs;
  • If the damage (defects) is caused by non-compliance with standards or technical regulations of the power, cable, telecommunication networks, radio signal power, including features of the relief and other similar external factors, usage of the device on the edge or outside of a network action zone, connection to inappropriate or defective external devices;
  • If the defect occurred due to natural wearing down during the exploitation of the device. In this case, natural wearing down is understood as the consequences of product’s operation, which caused the deterioration of technical status and appearance due to long-term using of this device;
  • If the damage of LCD pixels of screens does not exceed 0.0005 percent of the total quantity of pixels on the screen (according to the ISO 9241-303)
  • The occurrence of force majeure (natural phenomena, fire, lightning, etc.).


The manufacturer shall not carry warranty obligation:

Under no circumstances are the manufacturer or its authorized organizations for unusual, incidental, direct or indirect damage (or losses), including, but not limited to, lost profits, loss or inability to use information or data, expenses of recovering information or data, damages caused by interruptions in commercial, manufacturing or other activity, arising in connection with the usage or inability to use a device.

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