Hydra is a parallelized network login cracker that supports many protocols (SSH, FTP, HTTP/S, SMB, RDP, MySQL, SMTP, etc.). This is a(n) article / guide on Hydra.

Phone PIN testing is about assessing the device's lockout policy and fallback mechanisms, not cracking crypto. Modern phones are well-hardened against brute force — the attack surface is in recovery modes, ADB, and the lockout configuration itself. This is a guide on how to use PIN Brute-Force on mobile phones.