: Sites like GSM-Forum (Martview) or XDA Developers often have user-uploaded QCN files for specific Redmi models (e.g., Redmi Note 10, 11, or 12).
: Independent sites like XiaomiTools.com host archives of backup QCN files. Download Redmi eng Patched qcn
What is the or codename of the Redmi device you are working on? Knowing this will help in finding a compatible file. All Xiaomi Phone QCN Backup Files : Sites like GSM-Forum (Martview) or XDA Developers
: To write these files, your phone must be in Diagnostics (Diag) Mode . This usually requires root access or specialized commands via ADB. Redmi Note 10
Since there isn't a single "piece" or central official repository, you can typically find these files on mobile repair forums and specialized tool sites: