Hello, Maybe 3CX make new update where this kind of problem is solved? About issue: There is a rule, where "9" is prefix. When i make outgoing call, for example 9372XXXX, and other participant answers. When I am finished calling&talking and trying to call back - redial from call history - then redialing dont work. Prefix "9" is removed from call history when other participant answers the call. I cant call back. I have to copy or re-type number again. When other participant not answering to call, then yes, Redialing sucessfully work.