The bad state of operation of Blackberry became a well-known thing. The products of Android and IOS system lead to the failure of Blackberry. The appearance of Blackberry 10 still not redeems the situation of Blackberry.
Just like Rio mentioned in her blog, Blackberry missed the best time to enter in touch-screening market and did not make innovation as soon as possible. Nowadays, time changes at every moment, lots of substitutes will appear. Some of these substitutes have advantage of low price; some of these substitutes have more functions, Blackberry becomes less and less competitive. Although Blackberry made innovations in it new product Blackberry 10, it lost its point of difference. At first, Blackberry was famous for its safety and privacy, but now it updated BBM for Android and IOS, it was not as safe as before.
The crisis of Blackberry is not easy to overcome although they cost a lot to invent new application program. If the shortage of application programs of Blackberry is not solved, the market shares will keep decreasing.
https://blogs.ubc.ca/rioxinranli/2013/10/08/blackberrys-new-smartphone/
http://www.dnaindia.com/scitech/report-blackberry-updates-bbm-for-android-and-iphone-1920030