E mistakes Blackberry mobes disappear in 1984 two engineering students Mike and Douglas started research in MO while first success 1997 to send text messages then in 1998 they went public and blackberry 957 launch email contacts calendar keyboard system seconden develop customers.
Which made them to lose LS of consumers and Blackberry Messenger only Blackberry 201 but today they are not gone they are A4 billion cyber security company