Why might there not be a wi-fi sharing function on an iPhone 4 with iOS 5?

Question

iPhone

Could this feature be missing due to the Arabic origin of the phone, or is it something else?

Answer 1

In order for the function to appear in the phone menu, you need to activate data transmission over a cellular network (settings - basic - network - cellular data)

Answer 2

What operator? This may also depend on the operator and on the tariff. At AT&T, tethering is enabled only on expensive tariffs, for example.

Answer 3

Are the settings for the modem mode?
Did you overload the device after setting the settings?