I wouldn't say that... There's a thread on here about removing the plastic screen protector of a Defender and using the case with a glass screen protector. That thread has reports of the damage I've described in this thread, and I'm sure that's not the only reports.
If someone reports that their screen has been damaged, but only after the original otterbox screen protector has been removed, this cannot be due to the otterbox case itself.
I'm just not clear on what your point is.
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Your gonna get some reply's that say do not buy it will definitely scratch your phone and others that say your phone will be fine it won't scratch at all. At the end of the day if you think it's worth it to try it out then go ahead, but if you wanna take precautions get a full body skin to protect your phone before you use it.
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Cat toy?
But there's always a chance that a dirt particle will get under the skin as well, or that you will miss a small particle during the install, causing damage.
Another poster mentioned that lining the phone with tissue will prevent scratches. Again, if there are dirt particles between the tissue and phone, then the case will press that dirt onto the phone creating damage.
In other words, there is always some minute possibility of damage, regardless of whatever protective measures you take, unless you install whatever form of protection you're using in a completely dust free, particle free vacuum.