bbdevice

I recommend Blackberry.

Depends on who you are trying to prevent from having points of contact with.

Blackberry Bold 9900 / BBOS7/ HSPA+

Blackberry Z10
Blackberry Q5
Blackberry Q10
Blackberry Q20
Blackberry Passport
Blackberry Z30
Blackberry Leap


Make sure you look up the devices on Wikipedia and make sure you get the Canadian revision for North American frequencies. 


The Canadian Z10- STL100-3 Works
Download firmware  https://drive.google.com/drive/u/0/folders/1zs51uLkfxbyziyE-GmGxFp6cWvWQlTYe
Follow this tutorial. It will prevent the annoying finish setting up notifications because bbm doesn't exist anymore.
https://forums.crackberry.com/blackberry-10-os-f269/fix-bb10-devices-stuck-setup-sideloading-issue-1193846/


https://drive.google.com/drive/u/0/folders/1zs51uLkfxbyziyE-GmGxFp6cWvWQlTYe
Other Final Blackberry OS10 Firmware / 10.3.3.3216 Firmwares

Download Telegram X
https://pb-appstore.netlify.app/apps/telegram/