Press and hold the alt key, the right aA key (shift/caps lock) and the del key at the same time.
The BlackBerry smartphone will shut down, and the keys can now be released.
When the BlackBerry smartphone has restarted the reset is complete.
I`m think the only way to unlock phone is a hard reset (You can loose all data on phone). Below is link for guide: https://hardmasterreset.com/464-2/
Testimonial: "Blackberry STL 100-4 Model RFA90LW. Screen pattern lock, and I have now used all 10 attempts and have an image of a Sim card on my screen"
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