Hello again mods! Regarding Technomancy, it says control devices with your voices-- With lots of training, would it be possible to control the devices with just thoughts (kinda how in Harry Potter the endgame of magic is casting spells without speaking them)?

Also, it says you can trade your default AOL device against a different one, but would it also be possible to just buy a bunch of different AOL advice (so like having both the phone and the watch)?