A "free" QR code is simply a configuration generated by a free service provider or a community sharing node, allowing users to access their servers for free.
If you have a QR code image or a live code on another screen: Scan with Camera : Open v2rayNG, tap the in the top right, and select "Scan QR Code" Import from Gallery : If the QR code is saved as an image on your phone, select "Import from Gallery"
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