This phone is a pos by all standards. 1 my screen freezes and turns green and flashes which is a common issue. 2 after the update it faces and rotates the wrong way so yah no more having it sit like it used to. 3 no 5g....really...... come on.
Have you contacted Microsoft Support on your screen issues? If you wanted 5G then when did you purchase the Surface Duo? The specifications clearly stated 4G.