2014-07-10 11:28 AM
The sticker can be removed. Just be cautious in doing so; your nails are fine, don't use anything sharp like a knife.
The sticker may have been a last minute thing from Sony. Z1, Z1c, and the Z2 have it printed under the transparent layer (ie, not stickers). The Z tablets have it printed on their backs as well (again, not stickers).