You could probably pair a huge number of sets of aids with a phone for streaming/calls etc. BUT: One set per myphonak app. There are reports of folks using the youth version, and versions for other Sonova brands with their Phonaks. But I have no experience beyond pairing both my p90s and my i90s with my phone for calls & streaming. I use the app on the phone for my i90s, and the iPad for the p90s. But that happens infrequently that it is really a non issue. If I were swapping back and forth daily, it might be more of a problem, but for once a month or so, I just forget them and re-pair what I’m using then. I let the p90s out of the barn to stretch their legs now and then. Battery mgt and whatnot.
WH