@T-NT %This thread is now marked [Resolved]. You will have wider support if you start a new thread for your problem. About your questions - hardware support of 5.4Ghz band on Omegas would be news to me - haven't seen that yet. Why the 2.4Ghz wifi isn't appearing in the polling result - confirm that the wifi SSID isn't hidden or the protocol is TKIP-encrypted, as TKIP isn't currently "automatically supported" as posted by Onion here.

Before doing anything, make sure that your base is covered. New docs here:
https://docs.onion.io/omega2-docs/get-started.html
Then, you can configure/hunt for a new IP address location to suit your needs, whatever the method that you prefer. The one that works for you is the right one.

@Lazar-Demin happened again, another power cut and the onion was factory restored.

To work around, I created an shell script which install and configure my system and I call it on "/etc/rc.local". This file still intact because I put he on "/etc/systemupgrade.conf".

@OpheliaAutumn Awesome!