: Professional repair boxes (like the NCK Pro2) offer stable voltage regulation and verified firmware databases. Free, cloned versions often lack these protections, which increases the risk of permanently "bricking" the phone.

: Claims to support over 120 models , including popular series from Samsung (J-series), Oppo (Reno Z), and Vivo (Y-series).

: Unofficial tools may overwrite critical secure storage areas. While they might fix an immediate issue, they can lead to future instability or "silent failures" where hardware components stop responding.