using spigen glass here, but no a glass wouldnt affect the spen and finger touch no worries. but u wanna make sure the glass does not cover the sensors of the phone, at the top right of the top earpiece

Mine is Cell made in Japan, assembled in Korea. I thought our phone should be from the same batch but how come got differences?

I think I m gonna go for slim armor also. I like hard plastic dont really like rubbery casing cause hard to get it out of my pocket.