AT&T: No iPhone 4 purchases without pre-order at our stores until June 29th

Didn’t get your iPhone 4 pre-order in before everything went to hell? Planning on trying to fight the walk-in lines on June 24th? Best avoid AT&T stores. We just got a note from the carrier, who says that, due to “unprecedented” demand, they won’t be able to sell the iPhone 4 to anyone without a pre-order until June 29th.

The guidelines:

• Preordered for home or business delivery: iPhone 4 will begin arriving this week for customers who preordered. We’ll send an email when each order has shipped.

• Preordered for store delivery: AT&T retail representatives will begin calling customers this week to let them know their iPhone 4 is available for pick up in store.

• Retail purchase (no preorder): AT&T plans to have iPhone 4 inventory – available on a first-come, first-served basis while supplies last – on June 29 in its retail locations, at, and in business sales channels. As inventory sells out, AT&T will offer the convenient option of purchasing iPhone 4 and having it delivered to a home or business or an AT&T store. As always, customers will receive an email once their order is placed, and again when it ships.