# Adding additional frequencies (TX/RX) Some changes I made to the available frequency settings (including unlocking them all). The file is found here: ![Sub-Ghz_Changes](https://user-images.githubusercontent.com/57457139/174948988-f6955976-2318-4e3e-b658-93f0465bb22e.png) Officially supported frequencies: 300-348 MHz, 387-464 MHz, and 779-928 MHz (from [CC1101 chip docs](https://www.ti.com/product/CC1101))
Unofficially supported frequencies: 281-361 MHz, 378-481 MHz, and 749-962 MHz (from [YARD Stick One](https://greatscottgadgets.com/yardstickone/) CC1111 docs) No mainstream firmware (Official, Unleashed, or RogueMaster) currently allow anything outside of the officially supported CC1101 specs. **NOTE: Going outside the supported frequencies may DAMAGE YOUR FLIPPER AMP.
Please understand what you're doing if trying to break out of official frequencies.** You'll need to edit some code and recompile if you want to break outside of the officially supported frequencies. ([Hint here...](https://github.com/flipperdevices/flipperzero-firmware/pull/1287/files)) # CAUTION within 402-408 range!
Medical devices can operate here. This range is purposefully not included in my file above.