A Blackberry is a brand of a cellphone while a cellphone is a type of communication device. Blackberry is known for producing cellular phones that have a QWERTY type of keyboard unlike other cellphones that used the 3-type-in system where a user need to press three times number 1 on the keypad to get letter C.
Almost all Blackberry phone models have the QWERTY type of keyboard while some cellphones use the 3-type-in keypad or the touch-screen type. Some cellphones do not support WiFi nor Bluetooth but almost all Blackberry phones have these features. Most cellphones of today use the touch-screen pad, some newer Blackberry models still have the QWERTY type that people love.
You may think that the Blackberry that is being referred to right now is the fruit, but in this case, this Blackberry is a brand of cellphone that became popular a few years back. It was so popular that people aspired to get the Blackberry. After a few years, though, the iPhone gained its popularity, and this spelled the end for the Blackberry.
The cellphone may refer to different types of brands that are available right now. It might be Huawei, it might be Samsung, and it may even be the iPhone. There are a lot of cellphones right now that you can choose from. You have to look at the specs so that you can choose appropriately.