RT73 software v2.12.4 
1. Channel Delete problem has been resolved.  for example: When I delete Zone 1 channel 17, Zone 3 loses channel 1 and Zone 4 shifts up one position.

RT73 Software V2.12.3 
1.Fix the problem when use drop-down list read or write will get "Date mistake" error.
2. Hide the process bar when improting ham contacts, then the windows wont affect other applications operation.

Software V2.11.27
1. Add About information.
2. Add zone switch in preset buttons.
3. Add Only Rx in channels.