About a year ago we asked you to weigh in on the under-screen vs. flip-up camera debate. Under-screen cameras won a resounding victory, however due to technological challenges they are yet to make their ways to smartphones. That should change soon as ZTE will unveil the Axon 20 5G on September 1, which will be the first phone to take these invisible cameras past the prototype stage. We’ve seen renders and it does look pretty neat. ZTE Axon 20 5G teaser images However, Asus also posted a teaser of a phone with an unblemished screen – the Zenfone 7 will use a flip up mechanism to...