China IoT Update: Spectrum Allocation Changes — Key Takeaways
In January 2025, China’s Ministry of Industry and Information Technology (工业和信息化部, gōngyè hé xìnxīhuà bù) released new spectrum allocation guidelines affecting 320 MHz of radio frequency bands critical to the Internet of Things (物联网, wùliánwǎng). These changes, effective March 1, 2025, require foreign electronics companies exporting to China to redesign or recertify IoT modules across smart home, wearable, and industrial sensor categories. The 320 MHz adjustment spans the 900 MHz, 2.4 GHz, 5 GHz, and newly opened 6 GHz bands.
What Changed in China’s IoT Spectrum Bands?
The MIIT’s Radio Regulatory Bureau (无线电管理局, wúxiàndiàn guǎnlǐ jú) published a revised Radio Frequency Allocation Plan on January 15, 2025. Four bands received material changes that directly affect hardware design, power limits, and certification requirements for IoT products.
The 900 MHz band (880–915 MHz uplink, 925–960 MHz downlink) was fully refarmed from GSM/2G to LTE-M and NB-IoT. This eliminates backward compatibility with 2G-only modules — a common fallback in low-cost Chinese industrial sensors. The 2.4 GHz band, previously unlicensed with no IoT-specific constraints, now imposes a 10 dBm EIRP limit and a 10% duty cycle per hour for devices classified as “low-power IoT.” The 5 GHz band expands its unlicensed allocation by 120 MHz and adds mandatory support for 160 MHz channel widths, aligning China with global Wi-Fi 6E/7 standards. Finally, a new 500 MHz sub-band in the 6 GHz range (5.925–6.425 GHz) was opened exclusively for low-power IoT applications, with a maximum EIRP of 14 dBm.
| Band | Previous Allocation | New Allocation | Key Change | Impact on Devices |
|---|---|---|---|---|
| 900 MHz | GSM/2G (2 × 35 MHz) | LTE-M & NB-IoT | Full refarming; 2G sunset | Modules must support LTE-M or NB-IoT; 2G-only devices obsolete |
| 2.4 GHz | Unlicensed, no IoT limits | IoT category with 10 dBm EIRP | Power cap + 10% duty cycle | Firmware OTA to reduce transmit duty; range may shrink |
| 5 GHz | Unlicensed DFS/TPC | Expanded unlicensed + 160 MHz | +120 MHz spectrum; Wi-Fi 7 alignment | Recertification for Wi-Fi 6E/7 modules; hardware for 160 MHz needed |
| 6 GHz (new) | Not allocated | 500 MHz IoT low-power | New band opened (5.925–6.425 GHz) | New modules required; first-mover opportunity in smart home |
Impact on Consumer Electronics Product Categories
The 900 MHz refarming is the most disruptive change for industrial IoT and smart city devices. China had 78.3 million 2G IoT connections as of September 2024, according to the MIIT. Devices such as water meters, parking sensors, and asset trackers that relied on 2G fallback will no longer operate on any Chinese network after the 12-month transition period ends March 1, 2026. Foreign exporters of these devices must switch to LTE-M or NB-IoT modules, adding an estimated ¥30–80 per unit in BOM cost.
The 2.4 GHz power cap hits smart home and wearable categories hardest. A typical Bluetooth Low Energy (BLE) wearable transmits at 8–10 dBm; the new 10 dBm EIRP limit means most products will need to reduce power by 2–3 dBm to stay within the cap when antenna gain is accounted for. This will reduce indoor range from approximately 30 meters to 20 meters in typical Chinese apartments. Products that rely on continuous beaconing — such as location trackers or smart locks — must also rewrite firmware to respect the 10% duty cycle limit.
The 5 GHz and 6 GHz changes create an opportunity for premium Wi-Fi 7 routers, smart TVs, and AR/VR headsets. China’s 5 GHz expansion gives foreign Wi-Fi chipset vendors such as Qualcomm, Broadcom, and MediaTek a regulation-aligned path to market. The 6 GHz IoT band, while power-limited to 14 dBm, is ideal for short-range, high-density sensor networks — a critical use case for China’s smart-city pilots now in 47 cities.
Compliance Roadmap for Foreign Companies
Foreign companies must recertify any IoT module operating in the affected bands under China’s type approval (型号核准, xínghào hézhǔn) regime. The standard certification cycle is 8–12 weeks at an MIIT-authorized lab such as CTTL (China Telecommunication Technology Labs) or TÜV Rheinland Shanghai. Costs range from ¥120,000 to ¥350,000 per module, depending on the number of bands and radio technologies.
The transition timeline is split by band. For the 900 MHz and 2.4 GHz bands, all new products entering the Chinese market after March 1, 2025 must comply. Products already in the market or in transit have a six-month grace period until September 1, 2025. For the 5 GHz and 6 GHz bands, compliance is mandatory for new products from March 1, 2025, with no grace period — but existing products can remain on sale for their natural lifecycle as long as no hardware changes are made.
Why This Matters for Your China Strategy
China’s IoT device count reached 3.52 billion connections in 2024 (MIIT data), and the consumer electronics segment accounts for 42% of that total. Spectrum allocation changes directly affect product roadmaps, certification budgets, and time-to-market. Foreign companies that treat these changes as “just another regulation” risk losing distribution while Chinese brands — already adapting with local chipset partners — accelerate.
If you export to China and your product uses any of these four bands, the cost of inaction is immediate: customs rejection, fines, or forced redesign under a compressed timeline. The cost of action — lab testing, firmware changes, or module swaps — typically runs ¥3–8 million for a portfolio of 10 SKUs. That is manageable if planned across the remaining 12 months of the full transition window.
As a decision framework: If your product ships in 2025 with a 2G fallback, choose a full module swap to LTE-M/NB-IoT now. If your product uses 2.4 GHz BLE/Zigbee and your firmware cannot duty-cycle, evaluate a new SoC before September. If your product has Wi-Fi 6 and you plan to add Wi-Fi 7 within 18 months, the 5 GHz expansion justifies a pre-emptive recertification.
NEXT STEPS
- Audit every SKU against the new band rules. Use our IoT Spectrum Compliance Checklist to flag which modules need recertification and by which deadline.
- Select a test lab and begin pre-scanning. Read How to Pass China Type Approval Testing in 2025 for lab selection criteria, cost benchmarks, and timeline compression tactics.
- Build your 6 GHz IoT roadmap now. See 6 GHz IoT and Wi‑Fi 7 in China: Regulatory Roadmap for chipset partner options, reference design availability, and estimated certification lead times.
— China Gateway 360 —
Remote China market entry support, built around execution.
