I've found the best way to recycle iPhones is to find a family/friend who has an older phone than me, and gift it to them as a new phone! Sometimes this trigge

I've found the best way to recycle iPhones is to find a family/friend who has an older phone than me, and gift it to them as a new phone! Sometimes this triggers a chain reaction where the person I gifted the phone ends up gifting the phone they're replacing to someone else (usually someone switching from Android, or someone with an even older iPhone). Technically each pass down of the used phone is causing another phone to come out of service (and/or gifted again), but from an environmental standpoint this helps reduce demand for new phones since the people who received the gifted phones probably won't buy a new one for at least a couple additional years.