IBM® Rational® Performance Tester (RPT) is generally used for generating Web traffic.However how it can be used for generating load for wireless or mobile devices is a a bit interesting to see.
Sharing with you a article (Link) where you can just take a look on this.
Performance testing mobile web applications using IBM Rational Performance Tester
March 28, 2011 at 5:54 pm
Rigor can do similar testing from their SaaS webapp:
http://rigor.com/blog/mobile-application-load-testing.html