Originally Posted by
sincx
Is it still the case that SDC stops working on the app if a CPU clears?
CPU will never break SDC. For tickets in any revenue or award fare class, PN, and RN, you will be offered SDCs based on the current booking class (rbd) of your segment. For most upgraded tickets (R), you will be offered SDC based on the original booking class.
If you have a ticket in R and wish to SDC into R, this requires an agent and your original fare class available.
If you have a ticket in RN or PN and wish to SDC into your original booking class, this requires an agent.