Is there any way to share an iPhone's Wifi connection via Bluetooth or USB? I know Windows PC's and MAC's can do this, but what about iPhones?
Note: Please use text descriptions instead of images.
It can be found under Settings → Personal Hotspot. Password is also set there. Settings → Cellular, Personal Hotspot is also the same setting. When you turn it on, it asks if you want to turn on Wi-Fi and Bluetooth, or, USB only.
If USB is connected, one can turn on Personal Hotspot from Control Centre, it will automatically use USB to share cellular data. In Control Centre, holding down (force touch/ 3D Touch) the square block with Wi-Fi, Cellular data etc reveals two extra options of Airdrop in the bottom left and Personal hotspot in bottom right.
If USB is disconnected, Wi-Fi should remain in "on" state, but no new connections should be allowed, i.e. white state, not blue in control centre. Same for Bluetooth. This lets you share mobile data. But you cannot share iPhone's Wi-Fi connection using Wi-Fi or Bluetooth or USB.
At times, when connected to USB, iPhone can prompt for passcode for allowing computer connected to access data on the iPhone.
Keep in mind on windows PC you need to have iTunes installed for it to trigger to ask that permission to 'Trust the PC' on the phone when connected via USB.
There are Three Methods to Share internet from iPhone to other devices as per my knowledge.
Cellular Data ON if it isn't. This will need to be enabled in order to turn on the wireless hotspot.
Set Up Personal Hotspot
This button only appears if you've never used the personal hotspot before.
After setting up your personal hotspot for the first time, the Personal Hotspot option will appear in the main Settings list.
Install iTunes on your computer.
If you're tethering your iPhone to a Windows computer, the computer will need to have iTunes installed in order to connect.
Tap the Settings app on your iPhone. You can find this on one of your Home screens, or in the Utilities folder.
Tap the Cellular option.
you will see a prompt how to share the internet ( over USB only or wifi and bluetooth as well )
Click your iPhone to select it as your computer's network. Your computer will now use your iPhone's internet connection as you browse the internet.
Don't Close this Window.