Hi, i've been using a bumper for a few weeks now and having taken it off today I noticed a number of scratches and marks on the steel frame. Specifically just to the left of the headphone jack. Its not a big deal but it does appear that fluff and dust gets caught between the bumper and the frame and over time will mark the steel of the phone frame.
If you use one I recommend taking it off and clearing out any gubbins from time to time to reduce this effect.
If you use one I recommend taking it off and clearing out any gubbins from time to time to reduce this effect.