
QCN is a file type that is pre-installed on Samsung smartphones.

responds to firmware access to your smartphone These functions are the most frequently used to downgrade to outdated firmware versions or update newer ones. Updates software and, in particular, Write firmware repairs and upgrades.> Before flashing your device, please make a backup of the data on it. > Turn off your anti-virus software and Windows Defender on your computer. > For the process, you will need a Windows laptop or PC of any version. > Z3x Samsung Tool PRO software required. > The Z3x dongle or box requires a USB cable to connect to the computer. > You first need an activation Z3x box or dongle.Z3x Samsung Tool PRO 43.20 Prerequisites for using :

> Selecting between short and standard phone models. > Download manager for Firmware is built-in. > This tool contains English, Spanish, Portuguese, Romanian, Ukrainian, Arabic, Hungarian, etc.Removed language system, an old system very old and can’t normally work in future, so we decide to research new progressive language system which will allow the user easy make own language file. – problem with the loss-free space after patch CERT on some new phones.

– SM-M515F (Flashing, Direct READ codes via server, reboot download/recovery) – SM-A426B (Flashing, Direct READ codes via server, reboot download/recovery) – SM-A4260 (Flashing, Direct READ codes via server, reboot download/recovery) – SM-F415F (Flashing, Direct READ codes via server, reboot download/recovery)
