Band encyclopedia
n257 · 28 GHz mmWave
n257 is a 3GPP 5G NR band (28 GHz mmWave), TDD duplex, uplink 26500–29500 MHz and downlink 26500–29500 MHz. It is millimetre wave: huge bandwidth and very short range, mainly for hotspot capacity. 6 of the networks we check list it, but with a single source only.12
Will your device work on n257?
- MF833V✘ no n257Global industrial LTE Cat 4, USB-Afrom US$45 · MOQ 100
- Dongle 400✘ no n257For industrial AR glasses, USB-C, IP66from US$45 · MOQ 2,000
- F40✘ no n2575G RedCap dongle (needs 5G SA), 4G fallbackfrom US$46 · MOQ 2,000
None of our three devices covers n257 yet. Tell us your project and we will recommend a module that does.
Specification
| Type | 5G NR |
|---|---|
| Duplex | TDD |
| Uplink | 26500–29500 MHz |
| Downlink | 26500–29500 MHz |
| Channel bandwidth | 50–400 MHz |
| Layer | Millimetre wave (FR2) |
| Related bands | contains n261 |
Who uses it
| Operator | Country | Check |
|---|---|---|
| Telstra | Australia | single source (not scored) |
| Optus | Australia | single source (not scored) |
| NTT docomo | Japan | single source (not scored) |
| KDDI (au) | Japan | single source (not scored) |
| SoftBank | Japan | single source (not scored) |
| Rakuten Mobile | Japan | single source (not scored) |
What it means for IoT devices
- This is a TDD band: FDD-only modules cannot use it.
Our dongles (MF833V, Dongle 400, F40) do not support n257.
Sources
- C 5G NR frequency bands (Rel-19) Wikipedia · 2026-09-30
- C 3GPP RF bands list iTecSpec · 2026-09-30
Devices that support n257 (0)
None of the devices in Band Atlas supports this band yet.
