My iphone has recently acquired the nasty habit of randomly switching to the black screen with apple icon. It will stay on this screen, rendering it unusable, for anywhere from 5-20 minutes. It also occasionally has switched to this screen and then switched back and forth from off mode to the apple screen. the only way to fix it when this happens is to completely restore the thing, which I've now had to do at lease 10 times in less than two weeks. I also have been experiencing an issue where i have to press the home button a few times before it wakes up from sleep for about two months now. I should now mention that about a week before all of this started happening, my phone underwent a SERIOUS drop. It was a freak accident that couldn't have been avoided and it's the only time I've dropped my phone. Luckily, there was no visible damage done thanks to my AMAZING case from Otterbox. Im not sure if the damage is from the drop or not, since i had been experiencing the last of the issues listed above for a good while before the drop and did not experience the other issues for a decent amount of time after the drop. I am planning on sending the Iphone in for advanced replacement, however I am aware they test for drops. I have already checked for water damage and as I suspected the phone has none. I am wondering if there is a way to check for the drop damage myself before sending it in? I do not want to be sketchy and not let them know about the drop, but I do not want to get denied from advanced replacement over the phone by telling them if the damage is not even due to the drop. I'm also wondering if it would be better for me to wait and go to an apple or at&t store and inquire about this. I would not be able to for a month or two since I am away at school and without a car (or a nearby apple or at&t store), so it would be a decent amount of time before I could go this route. However I have heard many stories from posts on forums like these of merciful apple employees who write up the case as a manufacturer-defect, especially if the phone is in good condition (mine looks brand new as it is always in the case). ANy advice would be much appreciated!