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I replaced iphone 7 body (Housing) and i start its all normal but cellular Signal is very low some time coms otherwise no services help ….
Hello : few items to check do you correctly connected the coaxial cable near the battery connector (firmly inserted… it is my nightmare). Did you took original charge port from old case or use the one provided in the new case (may be poor quality). Have correctly connected the top antenna to the casing and not forget the small metallic part bellow? You should use the dismounting guide once again and check that you didn’t miss a screw or a part. good luck
