Band encyclopedia
B39 · 1900 DCS–IMT gap (China)
B39 is a 3GPP LTE (4G) band (1900 DCS–IMT gap (China)), TDD duplex, uplink 1880–1920 MHz and downlink 1880–1920 MHz. It is a capacity layer: wide and fast, with shorter reach than the low bands. Of the 155 networks we check, 1 use it (China).12
Will your device work on B39?
Specification
| Type | LTE (4G) |
|---|---|
| Duplex | TDD |
| Uplink | 1880–1920 MHz |
| Downlink | 1880–1920 MHz |
| Channel bandwidth | 5, 10, 15, 20 MHz |
| Layer | Capacity layer |
| Related bands | contains B33; same frequencies as 5G NR band n39 |
Who uses it
| Operator | Country | Check |
|---|---|---|
| China Mobile | China | ✔ cross-checked |
What it means for IoT devices
- B39 adds capacity in China: it raises city speeds, but coverage comes from the low bands.
- This is a TDD band: FDD-only modules cannot use it.
F40 support B39.
Sources
- A TS 36.101 Rel-19, Table 5.5-1 E-UTRA operating bands 3GPP (via iTecSpec) · 2026-09-30
- C LTE frequency bands Wikipedia · 2026-09-30
