Other changes will also make "photos look substantially better," TechRadar quoted the source as saying.
The OnePlus 7 Pro, which CNET reviewers have called, already has a with 48-megapixel standard, 8MP telephoto and 16MP ultra wide-angle cameras on its rear. The phone has 3x telephoto zoom and 10x digital zoom.
It also has a 16-megapixel front-facing camera embedded in the top, which pops out of the handset.
OnePlus didn't immediately respond to a request for comment.