O2 (Czechia): 4G and 5G bands

Checked 2026-10-06

O2 (Czechia) runs 4G on B3, B7, B20, B28; B20, B28 are the coverage layer. 5G bands: n1, n3, n28, n78. 5G SA: not found; RedCap: not found; 3G: —; 2G: —.

Check your module in Czechia

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

Bands in detail

Band	Name	Duplex	Uplink MHz	Downlink MHz	Layer	Checked
B1	2100 IMT	FDD	1920–1980	2110–2170	capacity layer	single source¹
B3	1800 DCS	FDD	1710–1785	1805–1880	capacity layer	cross-checked¹²
B7	2600 IMT-E	FDD	2500–2570	2620–2690	capacity layer	cross-checked¹²
B8	900 E-GSM	FDD	880–915	925–960	coverage layer	single source¹
B20	800 Digital Dividend	FDD	832–862	791–821	coverage layer	cross-checked¹²
B28	700 APT	FDD	703–748	758–803	coverage layer	cross-checked¹²
B38	2600 IMT-E TDD	TDD	2570–2620	2570–2620	capacity layer	single source¹
n1	2100 IMT	FDD	1920–1980	2110–2170	capacity layer	single source³
n3	1800 DCS	FDD	1710–1785	1805–1880	capacity layer	single source³
n28	700 APT	FDD	703–748	758–803	coverage layer	single source³
n78	3500 C-Band	TDD	3300–3800	3300–3800	capacity layer	single source³

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

Network status

5G SA	Not found
RedCap	Not found
LTE-M	Commercial⁴
NB-IoT	Not in GSMA list
2G	—
3G	—

Our dongles on this network

MF833V✔ Good67%
Supports B3, B7, B20 (coverage layer). Missing B28 (coverage layer).
Dongle 400✔ Good67%
Supports B3, B7, B20 (coverage layer). Missing B28 (coverage layer).
F40◐ Limited50%
Supports B3, B28 (coverage layer). Missing B20 (coverage layer), B7.
5G: 5G bands match, but no commercial RedCap yet

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Sources

C List of LTE networks in Europe (bands in use by operator) Wikipedia · 2026-10-06
C Frequency Checker: Czech Republic (bands by operator) Kimovil · 2026-10-06
C 5G NR network band country list (compiled from the Wikipedia list of 5G NR networks) Giztop · 2026-10-06
B LTE-M and NB-IoT roaming partners in Europe, with deployment bands Deutsche Telekom IoT · 2026-10-06