CNET , CNET.com and the CNET logo are registered trademarks of CBS Interactive Inc. Used by permission . 'Mark the Spot ' app lets iPhone users submit complaints about poor coverage . AT & T says app part of company 's commitment to listening to customers . Comment:
'Mark the Spot ' app lets iPhone users submit complaints about poor coverage . AT & T says app part of company 's commitment to listening to customers . Comment: