Query by providing the user agent:

look at http://www.useragentstring.com/pages/useragentstring.php or http://www.user-agents.org/

For mobile, look at http://en.wikipedia.org/wiki/List_of_user_agents_for_mobile_phones

Sequence : (DON'T FORGET TO CLEAN SESSION COOKIE)
User Agent :

Fatal error: Uncaught exception 'Zend_Session_Exception' with message 'Session must be started before any output has been sent to the browser; output started in /home/vps100806983/public_html/ZendFramework/tests/Zend/Http/index.php/104' in /home/vps100806983/public_html/ZendFramework/library/Zend/Session.php:454 Stack trace: #0 /home/vps100806983/public_html/ZendFramework/library/Zend/Session/Namespace.php(143): Zend_Session::start(true) #1 /home/vps100806983/public_html/ZendFramework/library/Zend/Http/UserAgent/Storage/Session.php(103): Zend_Session_Namespace->__construct('.Mozilla/5.0 Ap...') #2 /home/vps100806983/public_html/ZendFramework/library/Zend/Http/UserAgent.php(439): Zend_Http_UserAgent_Storage_Session->__construct(Array) #3 /home/vps100806983/public_html/ZendFramework/library/Zend/Http/UserAgent.php(548): Zend_Http_UserAgent->getStorage('Mozilla/5.0 App...') #4 /home/vps100806983/public_html/ZendFramework/tests/Zend/Http/index.php(39): Zend_Http_UserAgent->getDevice() #5 /home/vps100806983/public_html/ZendFra in /home/vps100806983/public_html/ZendFramework/library/Zend/Session.php on line 454