If I were to get my screen replaced by a third party? I broke my 4s screen and 80$ vs 200 is considerable for me. I'd like to hear from a apple employee if possible or someone with factual knowledge that's 100% true. They always say "we'll know" or "if we find out... The warranty is void." Soo... If I had the best person replace the screen perfectly, is there an alarm or trigger that goes off? Or are they just predicting that something noticeable will be out of place ?