Answer to: GPS fault after Samsung Galaxy S4 Display Assembly ReplacementIn my case the problem was conductive rubber seal on magnesium mid frame that bears motherboard all around. On original screen this seal was very well conductive. On replacement screen (ordered from China Alliexpress) there is nonconductive seal from silicone rubber adhesive. The solution is to cut original seal very gently. Than cut silicon rubber seal from replacement screen and place original seal in it. See the difference (replacement part with extracted original seal laying on it): https://goo.gl/photos/WVab9a73274yNryA9 There was the problem with interferences on screen while calling too. It is gone now .