where people touched by diabetes help each other.

Bought a G4 receiver with share from someone on here but I keep getting an error message- ERR69 AND ERR121 it says to call tech support any ideas on what the error is? I tried resetting it on back

1 Answer
Phoenixville, PA
I’d suggest calling Dexcom They will walk you through resetting it They need you to plug in a usb to your computer to reset it