Does the JACS TD191-B work in Malaysia?
✔ 3 networks good◐ 2 limited
Mostly. Good on CelcomDigi, Unifi Mobile and Yes; limited on Maxis and U Mobile. The reasons are on each card.
- ✔ Good4G B1 B3 B7 B8Evidence C · 2 sources
- ✔ Good4G B5 B38Evidence C · 2 sources
- ✔ Good4G B20 B38Evidence C · 2 sources
- ◐ LimitedNo band below 1 GHz whyEvidence C · 2 sources
- ◐ LimitedNo band below 1 GHz whyEvidence C · 2 sources
- B28 · missing
- B20
- B5
- B8
- B3
- B1
- B40 · missing
- B38
- B7
None of the missing bands is a main band here, so they do not limit the verdict.
below 1 GHz (coverage) 1–2.7 GHz 3–7 GHz mmWave · dashed = the JACS TD191-B lacks it · • = a main band
Maxis · Its coverage bands (B28) carry indoor and rural service; the JACS TD191-B has none of them.
U Mobile · Its coverage bands (B28) carry indoor and rural service; the JACS TD191-B has none of them.
2G being switched off: CelcomDigi Dec 2024
3G off on all networks (2021)
No legal ban, but operators restrict long-term roaming (evidence C, 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 EC200U-EU · 5/5 good · Quectel EG21-G · 5/5 good · Quectel EG25-G · 5/5 good
All 172 countries for the JACS TD191-B → · Malaysia: every network →
Sources for this answer (6) · 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 Frequency checker · Malaysia Kimovil · 3 Oct 2026
- C Malaysia: LTE B1, B3, B7, B8 and B28 in use (Celcom, Digi, Maxis, U Mobile) FrequencyCheck · 4 Oct 2026
- C Unifi Mobile: LTE B5 (850 MHz), B40 (2300 MHz) and B38 (2600 MHz); Maxis domestic roaming since mid-2023 Wikipedia · 4 Oct 2026
- D Yes 4G (YTL): LTE B20, B38 and B40 Lowyat forum (citing CellMapper) · 4 Oct 2026
Network by network
| Network | Verdict | Main bands | 4G bands (✓ supported · ½ partly · ✗ missing) | 5G | LTE-M · NB-IoT |
|---|---|---|---|---|---|
| CelcomDigi | ✔ Good 71% | — | B1✓ B3✓ B7✓ B8✓ B28✗ | — | — |
| Unifi Mobile | ✔ Good 75% | — | B5✓ B38✓ B40✗ | — | — |
| Yes | ✔ Good 75% | — | B20✓ B28✗ B38✓ B40✗ | — | — |
| Maxis | ◐ Limited 60% | — | B1✓ B3✓ B7✓ B28✗ | — | NB-IoT |
| U Mobile | ◐ Limited 60% | — | B1✓ B3✓ B7✓ B28✗ | — | — |
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.
