Frequency plan vs distance

Dear all,
I have a concern about if frequency effected to distance? Example 433MHZ vs 923Mhz?
Can I change rak2247 433MHZ to working with 923MHZ? Such as flashing firmware again?



It is not allowed, the hardware is differentiated!

thanks Nicholas,
How about distance between 433M vs 923MHz? Any different?


This is determined according to different rates and power.

In theory 433 might have a slight physical advantage but in practice the regulatory regime for 923 tends to offer more options.

It’s not just a question of radio physics, but of what you are allowed to do.