Originally Posted by
trust77
Would anyone know the mapping of the seats if the reservation was originally on the V4 777, now to this version? For example, if you selected seat 16J on the V4 777, does that transition to seat 16L on the V5 777?
Unfortunately, it transitions to whatever seat UA puts you in. There is no automatic mapping. Sometimes they will respect your initial selection, others it will a random reassignment. Good idea to watch these reservations pretty closely so you can get on it quickly if they swap and give you a crappy seat.