Adario Strange, writing for Mashable:
[A] glitch that has quietly plagued iPhone users — the “white/black screen of death,” a bug that abruptly soft reboots the smartphone — will finally be addressed in a future iOS 7 update.
"We have a fix in an upcoming software update for a bug that can occasionally cause a home screen crash," Apple spokesperson Trudy Muller told Mashable.
Interestingly, I've noticed iOS 7 to be far less stable on my iPhone 5S. Maybe I'm just an outlier, but the latest version of iOS — 7.0.4 — seems much better on my iPad Air. The Hone screen crashes have been few and far between on the tablet, whereas the bug appears once or twice daily on the phone.