Viettel (Vietnam): 4G and 5G bands

Checked 2026-10-03

Viettel (Vietnam) runs 4G on B1, B3, with no band below 1 GHz. 5G bands: n41, n78. 5G SA: not found; RedCap: not found; 3G: —; 2G: winding down.

Check your module in Vietnam

Results cover the 3 networks here; the home page checks every country at once.

Band	Name	Duplex	Uplink MHz	Downlink MHz	Layer	Checked
B1	2100 IMT	FDD	1920–1980	2110–2170	capacity layer	cross-checked¹²
B3	1800 DCS	FDD	1710–1785	1805–1880	capacity layer	cross-checked¹²
B8	900 E-GSM	FDD	880–915	925–960	coverage layer	single source¹
B7	2600 IMT-E	FDD	2500–2570	2620–2690	capacity layer	single source²
n41	2500 BRS	TDD	2496–2690	2496–2690	capacity layer	single source¹
n78	3500 C-Band	TDD	3300–3800	3300–3800	capacity layer	single source¹

Frequencies are from the 3GPP specifications. “Single source” means only one community source lists the band; it is shown but not scored.