Sept 25 (Reuters) - BlackBerry BB.TO :
* CEO says co will need to sell roughly 5 million devices annually to make
hardware arm workable after android launch
* CEO says some enterprise customers aleady testing its new android device
* CEO says decision to try android was "highly debated and contested" within
the co
* CEO says all 7 major North American carriers very interested in new device;
to launch with some before holidays
* CEO comments from media roundtable