Some iPhone purchasers had trouble activating Apple's new mobile device, with some saying that they had to wait four days before they could start using their phones.

Iain Gillott waited in the Texas heat to buy an iPhone on June 29, the day Apple's much-ballyhooed mobile device went on sale. But then it took him 47 hours to activate his new phone.

First, Gillott, a wireless technology analyst at IGR in Austin, learned that his family-rate plan with AT&T wouldn't accommodate an additional number. Then, an activation message sent by AT&T to Apple's servers timed out before it could be processed.

"When the next big device comes out, I'm not rushing out to buy one," Gillott said. He added that AT&T should have activated phones in its stores, instead of leaving users to do so online through Apple's iTunes service.

Gillott wasn't the only frustrated user. Activation problems lit up message forums shortly after the device went on sale. AT&T customers transferring their cell phone numbers were affected, as were others switching numbers from rival cellular network operators.

But many users who took new numbers reported successful iPhone activations in less than 10 minutes.

"I have talked with countless customers, all of whom have had no problems getting set up," said Jeffrey Kagan, an independent analyst in Atlanta. "Actually, I think we all expected the mad crush of new customers to [create] many more problems than have occurred."

In a posting on the MacRumors.com online forum, a user named "Strum" said it took four days to get his iPhone fully activated. But he wasn't deterred by the long wait. "Would I go through this again for the iPhone? Yes," he wrote.