The OP can upgrade from iOS whenever the appropriately Free/Libre mobile operating system is viable. iOS, despite being a very closed ecosystem, is much more p

The OP can upgrade from iOS whenever the appropriately Free/Libre mobile operating system is viable. iOS, despite being a very closed ecosystem, is much more privacy-conscious. In addition to being much more resistant to law enforcement and criminal adversaries, it submits far less information about the user to Apple by default. To be fair to the Android team, almost all of the user tracking and advertisement targeting can be disabled in the system and account preferences. Sure, Google could disregard the user preferences, but that might open up liability for fraud.