Does the JACS TD191-B work in Singapore?
✔ 3 networks good◐ 1 limited
Mostly. Good on M1, Singtel and StarHub; limited on SIMBA. The reasons are on each card.
- ✔ GoodMain bands B3Evidence A · 3 sources
- ✔ GoodMain bands B3 B8Evidence A · 3 sources
- ✔ GoodMain bands B3 B8Evidence A · 3 sources
- ◐ LimitedLacks main band B40 whyEvidence A · 4 sources
- • B8
- • B3
- • B40 · missing
- B38
- B7
below 1 GHz (coverage) 1–2.7 GHz 3–7 GHz mmWave · dashed = the JACS TD191-B lacks it · • = a main band
SIMBA · Main bands on SIMBA: B8 B40. The JACS TD191-B lacks B40, so coverage or capacity will be patchy.
2G off on all networks (2017)
3G off on all networks (2024)
Long-term roaming is not allowed: plan a local SIM or profile (evidence C, checked 25 Oct 2026)
Same model, other markets (networks good): ✔ United States 3/3 · ◐ India 2/4 · ✔ Saudi Arabia 3/3 · ✔ United Kingdom 4/4 · ◐ New Zealand 0/3 · ◐ Japan 1/4 · ✔ South Korea 3/3 · ✔ Canada 3/3 · ◐ Australia 1/3
Similar models here: Huawei E5577-320 · 4/4 good · Quectel EC200U-EU · 4/4 good · Quectel EC25-AU · 4/4 good
All 172 countries for the JACS TD191-B → · Singapore: every network →
Sources for this answer (8) · 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 · Singapore Kimovil · 2 Oct 2026
- C Singapore SIM cards: Singtel and StarHub 4G on B8, B3, B7; M1 on B3, B7 PhoneTravelWiz · 2023
- A Spectrum Rights issued: 1800 MHz (2013), 900 MHz (2017) and 2.5 GHz (2013) rights of M1, Singtel and StarHub IMDA · Nov 2026
- C SIMBA (formerly TPG Singapore): 10 MHz of band 8 and 40 MHz of band 40 from IMDA’s 2016 new-entrant auction, band 38 added later; a 4G operator from the start Powertec · 2025
- B Singapore telecom sector: SIMBA holds 900 MHz, 2.1 GHz, 2.3 GHz and 2.5 GHz, and no 700 MHz, 1800 MHz or 3.5 GHz DBS Group Research · 25 Jun 2026
- A 2016–2017 spectrum rights auctions: TPG (now SIMBA) allocated 20 MHz at 900 MHz and 40 MHz at 2.3 GHz IMDA · May 2017
Network by network
| Network | Verdict | Main bands | 4G bands (✓ supported · ½ partly · ✗ missing) | 5G | LTE-M · NB-IoT |
|---|---|---|---|---|---|
| M1 | ✔ Good 100% | B3 | B3✓ B7✓ B8✓ | n1 n3 n78 | NB-IoT |
| Singtel | ✔ Good 100% | B3 B8 | B3✓ B7✓ B8✓ B38✓ | n1 n78 | LTE-M · NB-IoT |
| StarHub | ✔ Good 100% | B3 B8 | B3✓ B7✓ B8✓ B38✓ | n1 n78 | NB-IoT |
| SIMBA | ◐ Limited 75% | B8 B40 | B8✓ B40✗ B38✓ | n1 | — |
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.
