AT T Wireless Sells Dedicated Messaging Device  NEW YORK (Reuters) - AT T Wireless Services Inc. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=AWE.N qtype=sym infotype=info qcat=news"&gt;AWE.N&lt;/A&gt;  launches a mobile e-mail and messaging device without voice  service on Monday, aiming to use a low price to tempt young  consumers.