I gust got a new 4S yesterday, and i found that the personal Hotspot is greyed !!!!
any Idea, how can i enable it?
Verify that your carrier supports Personal Hotspot for your device and that you have Personal Hotspot enabled on your cellular plan:
From Here > http://support.apple.com/kb/HT3574
Personal Hot spot
Understanding > http://support.apple.com/kb/HT4517
Trouble Shooting > http://support.apple.com/kb/TS2756
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