Copied from the User guide:
You can use Personal Hotspot (iPhone 4 or later) to share an Internet connection with a computer or other device—such as an iPod, iPad, or other iPhone—connected to your iPhone via Wi-Fi. You can also use Personal Hotspot to share an Internet connection with a computer connected to iPhone via Bluetooth or USB. Personal Hotspot works only if iPhone is connected to the Internet over the cellular data network.
Note: This feature may not be available in all areas. Additional fees may apply. Contact your carrier for more information.So, you might have to contact your provider. Has the phone been officially unlocked by the carrier it has been Locke to?
Then it is not tethering. It is just another service for you to hire. I want a bridge. That means to be able to use the same connection I have in the iPhone, whether I get it from Wifi, or cell provider, in the devices I connect to the iPhone. If you have some tech knowledge then you should understand what I mean. Apple is forcing this way a dependency with the carrier where there exist the option (for sure) to share the internet connection without that dependency.
I don't like that Apple did so. That is a limitation without any benefit for the user. Just for the carrier. And that is a bad thing since I bought the unlocked iPhone and Apple prefered taking. Are of the carrier and not the customer: me
Then it is not tethering.
Yes it is.
It is just another service for you to hire.
This is true.
I want a bridge. That means to be able to use the same connection I have in the iPhone, whether I get it from Wifi, or cell provider, in the devices I connect to the iPhone.
If you are using wifi on the iPhone, why would you want another wifi device to connect to wifi thought the phone?
You could get a system connect to internet which has usb or bluetooth but no wifi for example. The thing is to share iPhone's internet connection, and not asking the carrier if he allows you to do that with your iPhone. Carrier has nothing to provide but the connection to the iPhone.
Tethering is actually using the connection from the iPhone and not from the provider. Should be transparent to the provider (in this case: the carrier).
Thanks anyway for all your answers.