Helium's LoRaWAN Network is built upon 8-channel gateways. It is extremely important that you select the appropriate frequencies for gateway configuration for each country.
Nebra currently support US915, EU868, AU915. You should select your frequencies as follows:
US915 - North America
EU868 - Europe & UAE
AU915 - Australia, Brazil, Peru, and New Zealand
Please note that the frequency of an individual Nebra Miner is dictated by the hardware alone and cannot be switched using software updates of any kind.
Please reference the following links to determine which frequency is right for your region: