Cupertino, Calif. -- Just three days after launching its new iPhone 3GS model, Cupertino-based Apple said on Monday that it already has sold more than 1 million of the smartphones. In addition, the company said that over 6 million customers have downloaded its new iPhone 3.0 software ion the first five days of its release. The launch wasn't without hiccups, however, as some customers reportedly faced long waits when trying to activate their new phones on AT&T's wireless network, and some remain unable to use their new purchases. To compensate, Apple will offer affected customers a $30 iTunes Store credit, TechCrunch reported. "We are still resolving the issue that was encountered while activating your iPhone with AT&T," Apple wrote in an email to affected customers. "On Monday, you'll receive an email from Apple with an iTunes Store credit in the amount of $30. We hope you will enjoy this gift and accept our sincere apologies for the inconvenience this delay has caused."