iPhone reverse tethering by bluetooth

reverse tethering means, we setup another device (e.g an Android Phone)as hotspot, and share the cellular to iPhone.

When we use Wi-Fi to do reverse tethering, it's OK for iPhone.

When we use Bluetooth to do reverse tethering, it seems not working for iPhone.

Bluetooth reverse tethering works fine for iPad and iPod Touch.

For iPad with cellular, it can do both Bluetooth tethering and Bluetooth reverse tethering.

So, is there anyway to do Bluetooth reverse tethering for iPhone?