diff --git a/Sub-GHz/ReadMe.md b/Sub-GHz/ReadMe.md
index ace17af3..1f23c8f1 100644
--- a/Sub-GHz/ReadMe.md
+++ b/Sub-GHz/ReadMe.md
@@ -26,8 +26,25 @@ RogueMaster & CodeGrabber (Unleashed) allows unofficially supported frequencies
 **NOTE: Going outside the officially supported frequencies may DAMAGE YOUR FLIPPER AMP.<br>
 Please understand what you're doing if trying to break out of official frequencies.**
 
+Here's what the [manufacturer of the chip (CC1101) says](https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/1120743/cc1101-operation-outside-datasheet-frequencies/4154832) about going outside the limits:
+
+```
+The frequency range of the chip is always tested in the verification tests and there is always some design margin included before
+the VCO and/or PLL has problems operating for a specified frequency range. Working outside the frequency range can cause issues
+with the VCO and/or PLL and/or divider not operating correctly. If the VCO is operating outside it's standard frequency range,
+there are risks of unwanted emissions and no oscillation. The PLL can also fail to lock if operating outside it's standard
+frequency range and will still apply power to the antenna.
+
+Risks with antenna mismatch are increased harmonics, reduced output power and increased current consumption. Generally, the antenna
+mismatch can be large and the output stage will not be damaged when presented with a large mismatch for short periods of time.
+However, if the antenna mismatch is very poor for long periods of time, then this can effect the longevity of the chip especially
+if further stressed with maximum voltage and maximum temperature. Recommend keeping VSWR better than 5:1 for worst case scenarios.
+```
+
 You'll need to edit some code and recompile if you want to break outside of the officially supported frequencies. [Proceed with caution.](https://github.com/UberGuidoZ/Flipper/blob/main/Sub-GHz/Restaurant_Pagers/SubGHz_changes.md)
 
+Officially supported frequencies according to region (as manufactured and programmed on Official firmware):
+
 `Allowed to transmit (MHz):`<br>
 `R01: 433.05-434.79; 868.15-868.55`<br>
 `R02: 304.10-321.95; 433.05-434.79; 915.00-928.00`<br>