Depends on the phone. Some need resistors, for some it's enough to just short bo...

NullPrefix on Aug 13, 2019 | parent | context | favorite | on: Legit-Looking iPhone Lightning Cables Will Hijack ...

Depends on the phone. Some need resistors, for some it's enough to just short both data pins, some do protocol level talking over data pins. There are several standards for that with legacy usb.