yes you would need one
after 2 weeks i did notice a hairline scratch on my phone after very delicate use because of 1 mistake
so it is better to get a screen guard since i live in the UAE lumia screen protectors are tough to find but i got really lucky
so i have been using it for about 2 monts now and i notice light scratches on the screen guard so it is better for u to get one cause if i hadn't got a screen guard right away my phone would have had lots of scratches so be aware