The V60 requires specific NV (Non-Volatile) items to be calibrated for the network bands. A generic repair might restore the IMEI but leave you without signal strength. A proper repair rebuilds these calibration items.

It is critical to distinguish between:

: The LG V60 must be entered into Emergency Download (EDL) mode by connecting it to a PC while holding Volume Down + Power ; as the screen turns off, rapidly tap Volume Up until the PC detects "Qualcomm HS-USB QDLoader 9008".