Read more Rebtel stories on Newserhttp://www.newser.com/taggrid/18669/rebtel.htmlhttp://img1-cdn.newser.com/images/newser-black250x40.gifhttp://www.newser.com/2012 - Newseren-usNewser Feed GeneratorThu, 24 May 2012 04:51:11 CDThttp://www.newser.com/story/13846/wireless-giants-blocking-new-mobile-services.htmlPeter Fearon<img src='http://img1-cdn.newser.com/getimage.aspx?mediaid=54158&width=45&height=45&crop=Y&updateddate=20110401024651' border='0' />Wireless service giants AT&T and Verizon may be blocking other companies' devices and applications to defeat potential competition. Business Week reports that a discount international cell phone service, a wireless banking service, and PayPal, trying to bring its online payment service to wireless, were all obstructed by one or more...The AT&T, Inc. logo is seen on on of the company's buildings in San Antonio in this April 25, 2006 file photo. (AP Photo/Eric Gay, file)http://www.newser.com/story/13846/wireless-giants-blocking-new-mobile-services.htmlTue, 11 Dec 2007 22:54:45 CST