手機點解要update?

Just like computer... sometime will find out some BUG for the mobile... and sometime will update some feature or for mobile enchance function.... if you think your mobile is fine... you are no need to update it... or may be you can see the new update has any NEW function, feature or debug you need... if you all those update are useless for you... you don;t need to update it...
Actually.... mobile mainly for your telephone in / out... unless the NEW function work for you... otherwise.. just leave it as more stable..

Enjoy!!