It’s important to clarify that is a professional-grade software used for flashing, unlocking, repairing IMEI, and removing FRP (Factory Reset Protection) on Samsung mobile devices. However, the specific version you mentioned — “Z3x Samsung 2G Tool V3.5.0040” — is an older, outdated version that primarily supported older Samsung models (e.g., Galaxy S3, S4, Note 2, etc.) running on 2G/3G chipsets, and is no longer functional or safe for modern devices.