diff --git a/README.md b/README.md
index cb54ad77a..b2eea79f9 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,8 @@ The new universal GUI will work. [Proxmark3 Universal GUI](https://github.com/bu
 
 Please see the [Proxmark Forum](http://www.proxmark.org/forum/index.php) and see if your issue is listed in the first instance Google is your friend :) Questions will be answered via the forum by Iceman and the team. 
 
+It's need to have good USB cable to connect proxmark to USB. If you have stability problems (pm3 resets, firmware hangs, especially firmware hangs just after start and etc) - check your cable with USB tester (or try to change it). It needs to have resistance like 0.3 Om or less.
+
 ## The end
 
 - [@herrmann1001](https://mobile.twitter.com/herrmann1001) July 2018