The main problems: -
The main problems of the blackberry is that his o.s. I.e. operating system. Basically a operating system is main heart of any mobile phone .but in the blackberry the o.s. is only for run the mobiles.
The main advantage: - this is professionals phone. Like c.e.o of any company can operate this type of phones.
The overall my experience with BlackBerry: -
The BlackBerry was nicely molded phones which never drainor any other problems are not happens. the speed of any blackberry phone was great.so I think blackberry now have to change the o.s. only because of this gaming quality. .it should be change.