Verizon said today it has stopped pre-order online orders for the iPhone 4 to its existing customers after the most successful first day of sales in the history of the company.

“This was an exciting day," said Dan Mead, president and chief executive officer for Verizon Wireless.

"In just our first two hours, we had already sold more phones than any first day launch in our history. And, when you consider these initial orders were placed between the hours of 3 a.m. and 5 a.m., it is an incredible success story. It is gratifying to know that our customers responded so enthusiastically to this exclusive offer – designed to reward them for their loyalty.”

Verizon did not offer any specific sales figures of the iPhone 4, but analyst Mike Abraksky with RBC Capital Markets, estimated that pre-order sales were likely less than 100,000.

The general launch of the iPhone 4 on Verizon will happened on February 10. The company will open its retail outlets at 7 a.m. It will also be available at all Apple store locations, Best Buy. Select Walmart stores, and online at Verizon and Apple.