Download the required modem firmware for Xiaomi Redmi 5 Plus (codename Vince) for the Global device (MEG7) and China device (MEE7). The files with .xqcn extension are essential to fix a not-working internet connection and cellular network error due to a malfunction. These files are not flash-able via custom Recovery like TWRP. Instead, it needs the official Qualcomm Service Programming tool known as QPST Flash Tool.
Please be aware of not using these files without proper knowledge on how to fix a broken device. The files are provided as it is without any guarantee. It is provided for backup purpose only. We hold no responsibility for anything related to your device and what you do with it.
For Redmi 5 Plus Global Edition (Code MEG7):
For Redmi 5 Plus China Edition (Code MEE7):