Hi I have a lumia 920 and shared in connection tells me that is not available right now, I have the APN settings manually, and the operator can share already tried other phone
Try to download Access Point application from Store. This will help you you to easily manage individual operator settings for internet, MMS and internet sharing features.
You may refer to this link for the complete details of the said application.
I have been annoyed with the same issue these months (before former update, I COULD share the connection of LUMIA 920 within "access point" at "setting"). Today I have just done Portico update, but the situation is not changed...
I have tried changing my access point into dummy point and restart and setting back again and restart...
I may reset my phone, but I don't know how to recover...