Does the JACS TD191-B work in China?
✔ 2 networks good◐ 1 limited✘ 1 not usable
Mostly. Good on China Telecom and China Unicom; limited on China Mobile; not usable on China Broadnet. The reasons are on each card.
- ✔ Good4G B1 B3 B5 B41Evidence C · 3 sources
- ✔ Good4G B1 B3 B8 B41Evidence C · 3 sources
- ◐ LimitedLacks main bands B34, B40 whyEvidence C · 3 sources
- ✘ Not usableNo 4G band in common whyEvidence C · 2 sources
- B28 · missing
- B5
- B8
- B3
- • B39
- • B34 · missing
- B1
- • B40 · missing
- B41
- • B38
below 1 GHz (coverage) 1–2.7 GHz 3–7 GHz mmWave · dashed = the JACS TD191-B lacks it · • = a main band
China Mobile · Main bands on China Mobile: B34 B38 B39 B40. The JACS TD191-B lacks B34 and B40, so coverage or capacity will be patchy.
China Broadnet · China Broadnet uses B28; the JACS TD191-B supports none of them.
2G off on China Mobile (31 Dec 2025)
2G being switched off: China Telecom and China Unicom
3G off on China Mobile
3G being switched off: China Telecom Jun 2020 and China Unicom 15 Jun 2026
Long-term roaming is not allowed: plan a local SIM or profile (evidence B, checked 25 Oct 2026)
Same model, other markets (networks good): ✔ United States 3/3 · ◐ India 2/4 · ◐ Singapore 3/4 · ✔ Saudi Arabia 3/3 · ✔ United Kingdom 4/4 · ◐ New Zealand 0/3 · ◐ Japan 1/4 · ✔ South Korea 3/3 · ✔ Canada 3/3
Similar models here: Quectel EG912U-GL · 4/4 good · SIMCom SIM7600G-H · 4/4 good · Quectel EC200U-EU · 3/4 good
All 172 countries for the JACS TD191-B → · China: every network →
Sources for this answer (5) · evidence A = two or more sources, one official · B = one official source · C = industry and independent sources
- A TD191-B 4G LTE USB Dongle: product page and specifications (LTE FDD B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B20/B66/B71, TDD B39/B41) JACS Solutions · 5 Nov 2026
- A TD191-B datasheet (DS-TD191-B, Qualcomm MDM9x07, LTE Cat 4) JACS Solutions · Sep 2022
- C China F40 guide (sources: aode8.com, CSDN) Hyper Nexus · Sep 2026
- C China operators’ 5G / 4G spectrum overview 奥德彪学习网 · Sep 2026
- C LTE bands of China’s three operators CSDN · Sep 2026
Network by network
| Network | Verdict | Main bands | 4G bands (✓ supported · ½ partly · ✗ missing) | 5G | LTE-M · NB-IoT |
|---|---|---|---|---|---|
| China Telecom | ✔ Good 83% | — | B1✓ B3✓ B5✓ B40✗ B41✓ | n78 n1 | NB-IoT |
| China Unicom | ✔ Good 83% | — | B1✓ B3✓ B8✓ B40✗ B41✓ | n78 n1 | NB-IoT |
| China Mobile | ◐ Limited 71% | B34 B38 B39 B40 | B3✓ B8✓ B34✗ B38✓ B39✓ B40✗ | n41 n28 n79 n8 | LTE-M · NB-IoT |
| China Broadnet | ✘ Not usable 0% | — | B28✗ | n28 n79 | — |
Verdicts come from the Band Atlas engine on the open data (CC BY 4.0, GitHub). Networks change: confirm with the operator before you deploy. This page is not legal or certification advice.
