Originally Posted by
donny939
Check out the dx4s thread. There's something about a new update that won't allow you to bind to old receivers
SRS4210 is a DSMR RX its the latest version of DSM, not old, it's current. Buddy keeps typoing his RX, its the SRS4210 and buddy might be dyslexic. If its ACTUALLY a SRS4201 then he bought a fake RX
Could just be a bunk RX, it takes some resorses to check. A bud with a DX4s would be big help.