Originally Posted by
carrotjuice
You can call SQ and add the F saver waitlist to your current J advantage awards - do not cancel because you may lose even your J advantage seat, as there's no guarantee that the cancelled J advantage immediately are returned to the award pool.
Should you monitor that the F saver subsequently become available and your waitlist isn't cleared (this can happen, due to the disconnect between the SQ availability system against clearing of waitlists) - again you should call to have them secure the F saver first, then cancel and use your returned miles to rebook.
I might be wrong but my understanding from recent experience and postings here is that the only way to add your name to a waitlist is online, which means you would need the miles in the account. In the past you could add your name to waitlists by calling in, if you had miles tied up in existing award bookings, like CJ describes. As an alternative however, in case the miles you have to cover the difference between the J and F award, are sufficient to for a single F award, you can first waitlist one person online, and then the second. You do not need miles for 2 awards to waitlist.