Welcome to Retevis Support
We’re here to help.
1  Need step by step programming instructions for using software.
This blog will help -- http://blog.retevis.com/retevis-radio-frequency-programming/
2  hi i have rt6 and i want so scan frequency when i pres scan it scans just channels how to scan frequency? thank you
Every channel represents a frequency.
3  Trying to program RT6 with chirp and it says "Error reading data from radio: not the amount of data we want". any ideas?
RT6 has special Connect-Port design , could you please check if it is because of Poor contact ? Also RT6 use its own special programming cable , Please make sure if you use the right one ?