Mobile 4G IoT SIM Card
IoT SIM cards based on China Mobile's 4G network, designed for smart devices, connected vehicles, and remote monitoring applications.
Keep every device reliably online.
Shenzhen Weisu IoT Technology Co., Ltd. specializes in IoT connectivity services, partnering deeply with China Mobile, China Unicom, and China Telecom to deliver stable, reliable IoT SIM solutions for vending machines, charging stations, smart water/electricity meters, smart agriculture, and security surveillance. Our platform now serves over 10 million IoT devices across more than 300 cities nationwide.
Get a free solution100,000+
Cumulative number of IoT devices served
99.9%
Ensure average device online rate
300+
Number of cities covered nationwide
Core Products
We offer IoT SIM cards from China's three major carriers—China Mobile, China Unicom, and China Telecom—as well as global IoT SIMs and next-generation eSIM solutions. Our products support 4G, 5G, NB-IoT, Cat.1, and other network standards to meet diverse industry and application connectivity needs.
Mobile IoT SIM Card
Powered by China Mobile's 4G network, offering wide coverage and stable connectivity for IoT applications such as smart hardware, vehicle networking, and remote monitoring. Multiple data plan options available.
Unicom IoT SIM Card
Leveraging China Unicom's high-speed network with low latency and high bandwidth, ideal for applications requiring superior network quality such as industrial IoT, HD video surveillance, and smart factories.
Telecom IoT SIM Card
Built on China Telecom's network, supporting NB-IoT for low-power wide-area coverage and 4G for stable transmission. Ideal for industrial applications such as smart water/electricity meters, environmental monitoring, and smart agriculture.
International IoT SIM Card
A global IoT connectivity solution covering Asia-Pacific, Europe, and North America. Features multi-network switching and a unified management platform to provide one-stop connection services for cross-border IoT projects.
eSIM
Powered by embedded SIM technology for plug-and-play simplicity. Supports remote provisioning and over-the-air (OTA) updates. Ideal for smart wearables, in-vehicle terminals, industrial gateways, and other next-generation IoT devices.
Industry Solutions
We specialize in IoT solutions for vertical industries, delivering proven dedicated SIM card plans tailored to vending machines, charging stations, smart water/electricity meters, precision agriculture, security surveillance, and cross-border devices. We help enterprises rapidly connect their devices and transmit data.
Vending Machine
Provides stable 4G connectivity for vending machines, enabling remote inventory monitoring, real-time payment data transmission, and device failure alerts to ensure 7×24 hour uptime per unit.
Charging station
Industrial-grade IoT SIM solution for EV charging stations, featuring remote start/stop control, real-time billing data transmission, and device status monitoring—built to withstand harsh outdoor environments.
Water and electricity meter
NB-IoT low-power IoT card solution for smart water and electricity meters with battery life exceeding 5 years. Supports remote automated meter reading and data collection, even in weak signal areas like underground pipe networks.
Smart Agriculture
Broad IoT connectivity solutions for agricultural sensors, weather stations, and irrigation systems. Enables real-time data transmission for soil moisture, temperature, humidity, and more to support precision farming management.
Security Monitoring
High-speed IoT SIM solution for video surveillance, enabling smooth HD video streaming and cloud storage to ensure uninterrupted data transmission at 7×24 hours.
Cross-border Device
Global IoT connectivity solutions for cross-border logistics and overseas device deployment. Covers 200+ countries and regions with automatic network switching and centralized global device management.
Service Advantages
With years of industry experience and a professional technical team, Microsecond IoT delivers comprehensive IoT card service support across four core dimensions: network coverage, device stability, flexible pricing, and after-sales service.
Nationwide coverage
- Full coverage of China Mobile, China Unicom, and China Telecom networks
- Intelligently select the optimal network solution based on deployment scenarios.
- Supports multiple network standards including 4G, 5G, NB-IoT, and Cat.1.
Stable Online
- Device uptime remains above 99.9%
- Smart network switching ensures business continuity
- Industrial-grade SIM cards: high-temperature resistant and anti-interference.
Flexible Pricing
- Choose from pay-as-you-go and annual subscription plans
- Supports traffic pool sharing and pool management
- Transparent pricing with no hidden fees and predictable costs
Professional After-Sales Support
- 7×24-hour technical support hotline
- Respond to customer inquiries and incidents within 2 hours
- Dedicated account manager with one-on-one support
About Microsecond IoT
Shenzhen Microsecond IoT Technology Co., Ltd. was founded in 2018 and is a high-tech enterprise dedicated to providing IoT connectivity services. Headquartered in the Nanshan District Science and Technology Park of Shenzhen, the company leverages Shenzhen's technological innovation advantages to deliver stable and reliable SIM solutions for customers across various industries nationwide.
After years of development, our company has served over 10 IoT devices across more than 300 cities nationwide, maintaining a device online rate above 99.9%. Our core capabilities and business advantages include:
- Established deep strategic partnerships with China Mobile, China Unicom, and China Telecom to ensure high-quality network resources and services.
- Covers multiple industry scenarios including vending machines, charging stations, smart water and electricity meters, smart agriculture, and security monitoring, with extensive accumulated experience.
- Provides 7×24 hours of professional technical support with 2-hour response times to ensure your business runs continuously and reliably.
- Supports 4G, 5G, NB-IoT, Cat.1, eSIM and other network standards and SIM formats to meet the connectivity needs of diverse devices.
Featured Products
Browse our released IoT SIM products to explore technical specifications, use cases, and pricing plans. Choose the connectivity solution that best fits your business needs.
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China Unicom 5G IoT Card
High-speed IoT SIM card powered by China Unicom's 5G network—low latency, high bandwidth, ideal for industrial IoT applications.
China Telecom NB-IoT IoT SIM
Low-power IoT SIM card based on telecom NB-IoT networks, suitable for smart metering and environmental monitoring.
About the Team
Our experienced team, with core members from the telecommunications, IoT, and internet sectors, brings deep technical expertise and extensive project experience to deliver high-quality IoT connectivity services.
View Team Details
Example Member · Mr. Zhang
Lead corporate strategic planning and business direction, driving deep expertise in IoT connectivity.
Example Member · Li
Led technical architecture design and R&D team management, driving continuous iteration and upgrades of the IoT card management platform.
Example Member · Manager Wang
Led customer success and operations infrastructure to ensure enterprise clients receive high-quality IoT SIM card experiences.
Downloads
We provide customers with comprehensive technical documentation and software tools, including product manuals for all IoT SIM card models, device integration guides, AT command testing utilities, and the device management platform client, to help you quickly understand and use our products.
- Product Manual: Detailed Specifications for Mobile/Unicom/Telecom/eSIM IoT Cards
- Technical Documentation: Device Access Guide, NB-IoT White Paper, Security Management Standards
- Drivers: Device Management Platform Client, AT Command Test Tool, eSIM Client
Recruitment Center
Join Microsecond IoT and shape the future of the Internet of Things. We're looking for top talent to drive industry growth. Enjoy competitive compensation and expansive career opportunities.
- Open Positions: IoT Product Manager, Embedded Software Engineer, Sales Manager, and more
- Benefits: Social insurance and housing fund, paid annual leave, flexible working hours, project bonuses
- Online Exam: Take the online professional skills assessment after submitting your resume.
Get Your Dedicated IoT Card Solution
No matter your industry, our expert team can tailor an IoT connectivity solution for you. Contact us by phone or email, and we'll provide detailed product recommendations and a quote within 2 hours.