Re: Otterbox Defender replacement screen protector. I don't have an s4, but I use tech armor for a replacement screen protector on my otterbox defender for note 2. It works very well and I did the same thing when I had my iphone 4s. Its the clear hd one from amazon, comes three in a pack, and lifetime warranty. Posts. Hi i was wondering if any of you can recommend an HD screen protector that i can use if i pop out the screen protector of my Otterbox Defender on my Verizon Galaxy S4.