OnePlus is working on a flip foldable phone that would be equipped with a flagship grade camera, according to a tipster. OnePlus has launched only one foldable phone to date — the OnePlus Open. Oppo’s successor to the Find N3 Flip, could also arrive in the form of OnePlus’ next foldable phone.OnePlus is working on a flip foldable phone that would be equipped with a flagship grade camera, according to a tipster. OnePlus has launched only one foldable phone to date — the OnePlus Open. Oppo’s successor to the Find N3 Flip, could also arrive in the form of OnePlus’ next foldable phone.