On Tuesday, the company will discontinue support for its classic devices running BlackBerry 10, 7.1, and earlier operating systems.
This implies that any of its older handsets that do not run Android software will no longer be able to use data, send text messages, connect to the internet, or make calls, including 911 calls.
The end of service has no effect on BlackBerry's Android devices. BlackBerry's old-school cell phones with physical keyboards were so popular in the late 1990s and early 2000s that they were dubbed "CrackBerries."
The devices became a status symbol and staple for Wall Street executives, celebrities like Kim Kardashian, and even former President Barack Obama, thanks in part to their excellent reputation for security.
BlackBerry had more than 80 million active users at its peak in 2012.The company began in 1996 as Research In Motion, producing two-way pagers.
However, Apple's touchscreen revolution with the iPhone in 2007 rendered BlackBerry's services obsolete.
It created a few phones that lacked a physical keyboard, but they lacked BlackBerry's fundamental differentiator: a tactile keyboard.
BlackBerry finally abandoned its own software in favour of Android, on which it layered its security tools.
Although TCL discontinued producing BlackBerry-branded handsets in 2020, some enthusiasts are hoping for the arrival of Onward Mobility's BlackBerry 5G device, which was initially scheduled to ship in 2021.
Despite the delay, the company's website still displays a banner that reads "coming 2021."