If you can intercept 2.4GHz, you can incercept 900MHz
There is nothing magic about 900MHz that makes it harder to eavesdrop on.
If anything 900 MHz is easier:
1) It is all licensed band, so legitimate users will find you and dob you in before you can say "Pringles Can".
2) You can be charged just for transmitting - no matter the content.
3) The antenna needs to be 3x as big - way harder to hide and use.
Biting the hand that feeds IT
