If its normal (not stiff module) i will try use without any case. This Asus case is making much bigger phone and heavy.. Are you using any case? What about scratches on rear? I had zenfone 3, 5z and all have scratches.. To be honest 3 I used 3 years and none scratches, but wife take it for 2 weeks to her bag and a few scratches.. 5z I had 2 years and 2-3 scratches on rear.. how it is with 7 pro?