I have PK passport (which requires visa - transit, entry practically everywhere). If I dont need a transit visa via DXB I would doubt anyone else would
Other than that - transit pax leave aircraft and go to the upper floors where they can either exit to baggage claim/immigration (where passports are checked) or reenter the departure lounges (after security check only). No passport check. On your next flight out, the airlines would normally check passports.
Source: numerous transits through DXB.
Also you can access the following visa link to check if your nationality needs transit visa.
http://www.emirates.com/english/plan...uirements.aspx