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 Microsecond IoT Technology Co., Ltd. specializes in IoT connectivity and communication services. Through deep partnerships with China Mobile, China Unicom, China Telecom, and multiple international telecom operators, we deliver stable and reliable IoT SIM solutions for industries including vending machines, EV charging stations, smart water/electricity meters, smart agriculture, security surveillance, and cross-border logistics, both domestically and abroad.
As of 2026-5, we have served over100 ten-thousandsIoT devices, nationwide coverage300 remainingCity.
Get a free solution100k
Cumulative Service Devices
99.9%
Device Online Rate
300+
Overwrite City
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.
Telecom 5G IoT Card
Leveraging China Telecom's high-speed 5G 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 within 3 minutes and quickly identify issues.
- Dedicated account manager with one-on-one support
About Microsecond IoT
Shenzhen Microsecond IoT Technology Co., Ltd. specializes in IoT connectivity and communication services. We maintain deep partnerships with China Mobile, China Unicom, China Telecom, and multiple international telecom operators to deliver stable, reliable SIM solutions for vending machines, charging stations, smart water/electricity meters, smart agriculture, security surveillance, cross-border logistics, and more—both domestically and globally. As of 2026/5, we have served over 100 IoT devices across 3+ cities nationwide.
Over the long-term service period, device online rate has remained 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, responds to customer inquiries within 3 minutes, and ensures 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.
Company Credentials
Documents such as business licenses, operating permits, carrier authorizations, and system certifications are not displayed publicly on this page. You may submit an online request to view them. Our staff will contact you via phone or email for confirmation before sending the documents.
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Business License (Duplicate)
Verify entity name, unified social credit code, and business scope.
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Value-Added Telecommunications Business License
Business license information for IoT card-related services
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Carrier Cooperation Authorization Certificate
Authorization Documents from China Mobile, China Unicom, and China Telecom
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ISO 9001 Quality Management System Certification
Service Process, Delivery, and After-Sales Management System Certification
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Information System Security Level Protection Filing
Security compliance filing materials for the platform and business systems
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High-Tech Enterprise Certificate
Documentation for Recognizing R&D Capabilities and Innovation Investment
Applications submitted on business days are typically responded to within 1 business days.
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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Telecom 5G IoT Card
High-speed IoT SIM card powered by China Telecom's 5G network, featuring low latency and high bandwidth 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
General Manager Zhang
Spearhead the company's overall strategic planning and business direction, leading the team to deepen expertise in IoT connectivity.
Engineer Li
Lead technical architecture design and R&D team management, driving continuous iteration and upgrades of the IoT SIM card management platform.
Manager Wang
Lead customer success and operations infrastructure to ensure enterprise clients receive a premium IoT connectivity experience.
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 a detailed product selection guide and quote within 3 minutes.