the intro line about iphones being main devices is confusing. if one handset can hold only one account, the article should explain why instead of leaving readers to guess. step 6 should also say outright that opening the invite link is what links the account, because a preview account can sit in the member list and still miss test sends if the wrong identity is linked.

also the adb snippet needs an adb connect for each device first, or the -s flag will fail