Oddbean

You can make your own antenna and cut a single wire to length with an easy calculation Wavelength = speed of light / frequency (λ = c/f) Do a quarter-wave length vertical wire, like 22 gauge or something. At 915MHz should be around: 3.2248248772420216 inches. Not sure whether you can flash the firmware or if the modem is an sdr or different unit for each spectrum.

I did not know that about the antennas! But yeah these esp lora boards and the lilygos and all that, as long as you know the type of board you can delete/reflash the board to any specifications through the meshtastic website

Yeah I know its crazy but literally merely having an interest in electronics and computers means you are already on the road to your ham license. You learn all kinds of awesome things (that silly calculation above as an example- yet mind blowing), for a lay person like myself (not an RF Engineer/embedded), I learned the building blocks of our wireless world Lay flat spiral bound ARRL technical manual. Buy one today! At worst a good reference manual to learn what the rules are before you break them and are hunted down by elderly volunteer ham radio spectrum monitors with directional antennas. FCC doesn't hunt for people anymore mostly. You can make cool PCB antennas for Wi-Fi and all kinds of crazy shit. Go get em! In summation, I'm a far more effective Internet troll then I would have been were I not a ham.