Well my feeling is that you wouldn't need it for the first version of the phone wallet. I'm interested in Darkcoin but I think the message should be that Darksend is an option, not something that's part of every transaction.
I hope Even doesn't think like you. DarkSend should be part of every transaction(in the stable version) not an option! That's the whole point of Darkcoin after all. We don't even need an option to not using DarkSend IMO, at least not GUI one.