Who We Are
Over a Decade of Excellence in Rugged Device Manufacturing
Founded in 2014 and headquartered in Shenzhen, China, Shenzhen Phonemax Technology Co., Ltd. is a Chinese National High-Tech Enterprise and specialized OEM/ODM manufacturer in the rugged mobile industry. We integrate industrial design, rugged hardware engineering, custom Android OS and firmware, application integration, production and field-reliability validation. From heavy-duty smartphones to industrial rugged tablets and professional handheld terminals, Phonemax provides dependable mobile solutions for enterprise partners, distributors and professionals in more than 100 countries and regions.
Engineering & Production
From Innovative Idea to Reliable Rugged Hardware
Our manufacturing and quality-control capabilities support the full product lifecycle—from rugged hardware engineering and custom Android integration to production, inspection and validation. Depending on the model and project requirements, testing can include water resistance, dust ingress, drop, vibration, temperature and functional performance. Selected hazardous-environment solutions follow project-specific ATEX compliance requirements under EU Directive 2014/34/EU.
Whether you need custom enterprise hardware, Android application integration, private-label products or regional distribution support, Phonemax provides flexible and scalable OEM/ODM solutions for international B2B projects.
What We Create
A complete portfolio of rugged intelligent devices.
Our products combine practical functionality with durable engineering for consumer, outdoor, industrial and professional applications.
Quality & Craftsmanship
Quality built into every stage.
Reliable rugged devices require careful attention from component handling and assembly through inspection and final verification. Standardized production processes and quality checks help us maintain consistency across every project.
We continue to improve our engineering, manufacturing and quality-management practices to meet the needs of customers in different markets.
Global Connections
Built in Shenzhen. Connected worldwide.
Phonemax products serve customers in more than 100 countries and regions. Through international exhibitions and direct cooperation, we stay close to distributors, retailers, enterprise customers and technology partners—and turn real market feedback into better products and stronger long-term relationships.
Experience & Compliance
Facts that define Phonemax.
Clear company facts and model-specific compliance information for distributors, enterprise buyers and technology partners.
Why Phonemax
A practical partner for rugged mobility.
Practical cooperation built around your product, market and project requirements.
Choose the Right Path for Your Needs
Request product information for distribution and OEM/ODM projects, or explore Phonemax rugged devices for outdoor and professional use.
2026 Latest Technology-Phonemax R4 GT: The World's Smallest Thermal Imaging Night Vision Rugged Phone
Size: 121mm*59.2mm*18.3mm
Weight: 190g
Bands:
4G: FDD: B1, B2, B3, B4, B5, B7, B8, B12, B13, B14, B17, B18, B19, B20, B25, B26, B28A, B28B, B66, B71. TDD: B34, B38, B39, B40, B41
3G: B1, B2, B4, B5, B6, B8, B19
2G: B2, B3, B5, B8
Size: 121mm*59.2mm*18.3mm
Weight: 190g
Bands:
4G: FDD: B1, B2, B3, B4, B5, B7, B8, B12, B13, B14, B17, B18, B19, B20, B25, B26, B28A, B28B, B66, B71. TDD: B34, B38, B39, B40, B41
3G: B1, B2, B4, B5, B6, B8, B19
2G: B2, B3, B5, B8
PRODUCT QUESTIONS
Frequently asked questions
What is the difference between thermal imaging and night vision on the R4 GT?
Thermal imaging visualizes temperature differences, while night vision captures visible scene detail in darkness using infrared assistance. The two functions support different inspection, search and outdoor tasks.
Who is the Phonemax R4 GT designed for?
The R4 GT is designed for technicians, inspectors, outdoor users and professionals who want thermal imaging and night vision in a compact rugged smartphone.
How compact is the R4 GT?
The R4 GT measures approximately 121 × 59.2 × 18.3mm and weighs about 190g, giving it a much smaller footprint than many thermal-imaging rugged phones.
Will the R4 GT work with my carrier?
The R4 GT supports a broad range of 4G bands, but no phone is guaranteed to work with every carrier. Compare the product band list with your operator’s frequencies before purchase.
Can the R4 GT replace a professional thermal camera?
The integrated thermal camera is useful for convenient inspections and temperature-pattern detection. For regulated, calibrated or safety-critical measurements, use certified professional equipment suitable for the application.