Also use a linux phone like Librem 5 or Pinephone (still early days for both), or root an android phone and flash it with a custom ROM. Best option for security

Also use a linux phone like Librem 5 or Pinephone (still early days for both), or root an android phone and flash it with a custom ROM. Best option for security and privacy is GrapheneOS but only supports Pixel phones. LineageOS supports lots of devices. There are others.