Apple just released iPhone OS 4.0 SDK Beta 4 to its developers and some are surprised or overjoyed(?) to see internet tethering available as an network option in the new beta firmware.
![Att Internet Tethering](http://sanziro.com/wp-content/uploads/2010/05/att_internet_tethering.jpg)
Tethering actually was a feature in iPhone OS 3.0 and some international carriers already support internet tethering for months now. But not in the US for AT&T. For many technically inclined, this is the sole reason why they disliked AT&T’s monopoly for iPhone. According to reports, AT&T did not offer internet tethering because its wireless network could not handle the traffic. This is the same concern AT&T had when it delayed rolling out of MMS service to the US. This must be a joke to other international carriers and market users.