In the quest for full-screen smartphones, the selfie camera proved to be a persistent obstacle. Notches shrunk and we got punch holes, pop-up and flipping workarounds but it was only a matter of time before we got an under display solution. Several makers are working on the tech, but today ZTE introduced its Axon 20 5G - the first comercially-ready smartphone with an under-display selfie camera. Being the first of its kind brings plenty of bragging rights but also required a whole new approach to the screen assembly process. One of the big problems with past under-display cameras so...