Tethering blocked with message about contacting provider Sometimes when I want to use tethering I get a message that I need to ask my provider.  How can I "unblock" the Personal Hotspot feature so it always works?
(In the phone, obviously)

Phone is not under contract and tethering on Android works with the same provider. There is no reason it should not work with my end provider.
The phone had separate APN settings for "MOBILE DATA" and "PERSONAL HOTSPOT".  Copying from the mobile data ones solved the problems.  

(With this provider, the date settings are often not be set automatically when switching SIM, at least on Android.  Also I don't remember the two settings to be separate.)