Does the JACS TD191-B work in the United States?
✔ 3 networks good
Yes. The JACS TD191-B works on AT&T, T-Mobile and Verizon, every network we track in the United States.
- ✔ GoodMain bands B2 B4 B5 B12 B17★ Coverage (FCC map, 30 Jun 2025): 4G LTE 57% of US land · 5G 32% (7/1 Mbps), 22% (35/3 Mbps) · outdoorEvidence C · 4 sources
- ✔ GoodMain bands B12 B66 B71★ Official: T-Mobile’s own network page lists LTE on Band 4, 5 and 66, and Extended Range LTE on Band 12 and 71; Band 2 (1900 MHz) is listed for 2G only, and 1900 MHz for 5G n2/n25.★ Coverage (FCC map, 30 Jun 2025): 4G LTE 45% of US land · 5G 38% (7/1 Mbps), 27% (35/3 Mbps) · outdoorEvidence A · 4 sources
- ✔ GoodMain bands B13★ Coverage (FCC map, 30 Jun 2025): 4G LTE 60% of US land · 5G 18% (7/1 Mbps), 12% (35/3 Mbps) · outdoorEvidence A · 4 sources
- • ★ B71
- • B12
- • B17
- • ★ B13
- • B5
- • B2
- • B4
- • ★ B66
- B30 · missing
- B48 · missing
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
2G off on all networks (2017–2026)
3G off on all networks (2022)
No legal ban, but operators restrict long-term roaming (evidence B, checked 25 Oct 2026)
Same model, other markets (networks good): ◐ 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 · ◐ Australia 1/3
Similar models here: Quectel EC25-AF · 3/3 good · Quectel EG21-G · 2/3 good · Quectel EG25-G · 2/3 good
All 172 countries for the JACS TD191-B → · United States: every network →
Sources for this answer (9) · 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 US country guide (sources: frequencycheck.com and others) Hyper Nexus · Sep 2026
- C Frequency checker · USA Kimovil · 30 Sep 2026
- A DA 12-1479: AT&T Mobility Spectrum and CenturyTel seek consent to assign Lower 700 MHz B and C Block and AWS-1 licenses to AT&T FCC · 11 Sep 2012
- A Auction of 700 MHz Band Licenses Closes; winning bidders announced for Auction 73 (DA 08-595): Verizon Wireless C block, AT&T B block FCC · 20 Mar 2008
- A T-Mobile network: network frequencies by technology (4G LTE Band 4, 5, 66; Extended Range LTE Band 12, 71; 2G Band 2; 5G n71, n41, n2/n25) T-Mobile · 5 Nov 2026
- A Auction of AWS-3 Licenses Closes; winning bidders announced for Auction 97 (DA 15-131): the 1755–1780 / 2155–2180 MHz AWS-3 blocks that extend AWS into LTE Band 66 FCC · 30 Jan 2015
- C North American networks CellMapper Wiki · 30 Sep 2026
Network by network
| Network | Verdict | Main bands | 4G bands (✓ supported · ½ partly · ✗ missing) | 5G | LTE-M · NB-IoT |
|---|---|---|---|---|---|
| AT&T | ✔ Good 90% | B2 B4 B5 B12 B17 | B2✓ B4✓ B5✓ B12✓ B17✓ B30✗ B66✓ B14✗ | n5 n77 n260 n2 n66 | LTE-M |
| T-Mobile | ✔ Good 100% | B12 B66 B71 | B4✓ B12✓ B66✓ B71✓ B5✓ | n71 n41 n25 n258 n260 n261 n77 n66 n2 | LTE-M · NB-IoT |
| Verizon | ✔ Good 88% | B13 | B13✓ B2✓ B4✓ B5✓ B66✓ B48✗ | n77 n261 n260 n5 n2 n66 | LTE-M · NB-IoT |
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.
