Till now two iPhone features introduced in iPhone OS 3.0 have not been activated by AT&T: Multimedia Messaging Service (MMS) and tethering.

According to AT&T, rumors saying that AT&T will surcharge its users $55 to activate the tethering capability are fake.  

Via Tethering, iPhone users would be able to connect their Mac or PC to the Internet using AT&T's data network instead of Wi-Fi. It is a very useful feature for business travelers or others who are away from a faster network and need quick access. The launching of feature was done during the introduction of iPhone OS 3.0 earlier this year.

However, customer were left wondering when AT&T will enable tethering, and whether it'll cost extra due to absence of AT&T's logo from a keynote slide at Apple's Worldwide Developer Conference (WWDC) in San Francisco earlier this month, paired with the cell phone service provider's taciturnity. 

Rumors suggest that users who want to use tethering would require paying hefty surcharge. However, the telecom major AT&T denies this rumor. 

The company has posted information with the aim to the rumors to rest. But the company did not specify as to when it will activate tethering or if there will be any added cost at all.

A statement by the company says, "There is a lot of reports out there, but wanted you guys to know that rumors of $55 tethering plan on top of an unlimited data plan are false. We'll have more news to share when the iPhone tethering option is closer to launch."