ViVO X21 qcn Fix Unknown Baseband and Null imei
ViVO X21 QCN For Fix Baseband No Service
QCN is a Essential File that is Use for advance Repair Operation
involving the restoration of a mobile OEM Inputted IMEI [Restore IMEI]
via Supported Qualcomm IMEI Rewriter Tool
Step 1: Launch the QFILtool.
Step 2: In the dashboard, go to the “QFIL” and choose the “Tools” option and then select the “QCN Backup Restore” option.
Step 3: When the new window opens, click on the “Restore QCN” option and wait to complete the restoring process.