IoT SIM Cards — China Mobile, China Unicom, and China Telecom | 2G/3G/4G/5G

SimtoLink IoT SIM cards for China Unicom, China Mobile, and China Telecom, with stable network connectivity for your IoT devices.

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Product Overview

An IoT SIM card is a SIM built for IoT devices, with stable data connectivity. Our cards support 2G, 3G, 4G, and 5G, cover every region in China, and keep a wide range of IoT applications online.

All-network coverage

Works on China Mobile, China Unicom, and China Telecom.

Secure and reliable

A dedicated APN keeps data transmission secure and stable.

Flexible billing

Several plans, so you pay for what you need.

Unified management

A visual management platform that monitors usage in real time.

IoT SIM cards — SimtoLink professional IoT connectivity

SimtoLink IoT SIM card types

Several IoT SIM card formats for different devices and applications.

2G IoT SIM cards

For low-rate data, such as smart water meters and electricity meters.

  • Low-power design
  • Wide coverage
  • Lower cost
  • Stable and reliable
Rate: 9.6 Kbps Latency: 500–1000 ms

3G IoT SIM cards

For medium-rate use, such as in-vehicle devices and security monitoring.

  • Voice and data at the same time
  • Stable coverage
  • Strong compatibility
  • Strong value
Rate: 2 Mbps Latency: 100–300 ms
Recommended

4G IoT SIM cards

For high-rate use, such as video surveillance and mobile payments.

  • High-speed data
  • Low latency
  • High concurrency
  • Broad range of uses
Rate: 150 Mbps Latency: 50–100 ms

5G IoT SIM cards

For very high-rate use, such as autonomous driving and industrial automation.

  • Very high-speed transmission
  • Ultra-low latency
  • High connection density
  • Network slicing
Rate: 1 Gbps+ Latency: <10 ms

NB-IoT SIM cards

For low-power, wide-coverage use, such as smart metering, smart manhole covers, and environmental monitoring.

  • Ultra-low power
  • Deep coverage
  • Massive connections
  • Lower cost
Rate: about 250 Kbps Deep coverage

VPDN IoT SIM cards

For uses that need strong data security, such as financial payments, government services, and enterprise private networks.

  • Dedicated private network
  • Data isolation
  • Secure and reliable
  • Custom APN
Private-network channel End-to-end encryption

Plan pricing

Flexible plans for different business needs.

Basic plan

¥ 1 /month
  • 10 MB of data per month
  • 2G/3G network
  • Basic management platform
  • Email technical support

For devices that send data infrequently.

Popular

Standard plan

¥ 2 /month
  • 100 MB of data per month
  • 4G network
  • Full management platform
  • 7×24 technical support

For medium-data applications.

Advanced plan

¥ 5 /month
  • 500 MB of data per month
  • 4G/5G network
  • Advanced analytics
  • Dedicated account manager

For high-data business applications.

Enterprise plan

Contact sales
  • 2 GB of data per month
  • All network standards
  • API access
  • Custom services

For large-scale deployment.

Use Cases

Used across IoT scenarios in many industries.

Connected Vehicles

In-vehicle devices, GPS positioning, remote diagnostics, and fleet management.

Security monitoring

Video surveillance, alarm systems, access control, and perimeter protection.

Smart metering

Remote reading and monitoring for water, electricity, and gas meters.

Mobile payment

POS terminals, self-service kiosks, and mobile checkout devices.

Environmental monitoring

Temperature and humidity, air quality, and noise monitoring.

Industrial automation

Equipment monitoring, production-line control, and remote maintenance.

Smart home

Smart locks, smart appliances, security monitoring, and scene automation.

Smart logistics

Shipment tracking, warehouse management, cold-chain monitoring, and intelligent dispatch.

Smart retail

Unstaffed convenience stores, electronic shelf labels, smart shelves, and footfall analysis.

More scenarios

See more IoT SIM card use cases and solutions.

Technical Advantages

Leading technical capability for your IoT applications.

01

Dedicated network

A dedicated IoT APN, kept separate from consumer mobile networks, so data stays secure and stable.

02

Intelligent network selection

Selects the strongest signal automatically and switches across carrier networks, so devices stay online.

03

Data control

Precise data accounting and control, with threshold alerts that catch unusual usage.

04

Batch management

One platform for batch activation, suspension, and reactivation, at a lower operations cost.

FAQ

Answers to common questions about SimtoLink IoT SIM cards.

SimtoLink IoT SIM cards support 2G, 3G, 4G, and 5G, and work with China Mobile, China Unicom, and China Telecom. Choose the standard that fits the device and the application, so the connection stays stable in the environments you deploy.

We offer several plan types:

  • Monthly plan: for devices with steady data needs
  • Annual plan: a lower price for long-term use
  • Data pool: several SIMs share data, and you allocate it as needed
  • Trial plan: a small data allowance to check device compatibility

Choose by device count, expected data use, and budget. Our technical team can advise on the fit.

SimtoLink IoT SIM cards are used in a wide range of IoT devices:

  • Industrial equipment: production-line monitoring and maintenance terminals
  • Smart hardware: smart home devices and wearables
  • Connected vehicles: in-vehicle terminals and GPS trackers
  • Environmental monitoring: weather stations and water-quality monitors
  • Security equipment: cameras and alarm systems
  • Smart agriculture: sensors and irrigation controllers

Under China’s real-name rules, IoT SIM cards must be registered:

  1. Submit a business license or a personal ID
  2. Provide how the device will be used and the application
  3. Sign the IoT SIM card usage agreement
  4. Activate after approval, usually within 1–2 business days

Our support team will walk you through registration.

SimtoLink provides an IoT SIM management platform where you can:

  • See real-time data use for each card
  • Review usage history and bill details
  • Set data alerts and usage caps
  • Top up and renew online
  • Manage card status: activate, suspend, or cancel
  • Export data reports in batch

The platform is available on the web and through an API, so you can integrate it with your systems.

If a card will not connect, check the following:

  1. Confirm the card status is normal and data remains
  2. Check that the SIM is seated correctly
  3. Confirm the device APN is set correctly
  4. Check signal strength at the site
  5. Restart the device

If it still fails, contact our 7×24 technical support team:
Phone: +86-13925206166
Email: service@simtolink.com

Related products

More IoT products and services from SimtoLink.

International IoT SIM Cards

Coverage in 200+ countries and regions, with seamless international roaming for cross-border business.

Communication Modules

High-performance modules that support multiple protocols and fit into your devices quickly.

IoT Cloud Platform

A one-stop IoT cloud platform for device management, data analytics, and related services.

Smart Hardware

A broad hardware line, including sensors, gateways, and controllers.

Ready to put SimtoLink IoT SIM cards in your devices?

Talk to a SimtoLink specialist for a tailored connectivity plan and pricing on IoT SIM cards and international IoT SIM cards.

Request a consultation