the facetime and imessage issues mostly sound like signal related issues to me. tho the flicker, is that on the front camera? i've noticed a flicker on mine like it flicks darker, random glitch whist seems to go if you flick to back camera then to front, i've reported the bug, it seems to be a known bug. sprint's horrible speeds and connection are sprint's fault, so why would apple take blame for that?! lol. as for your usage, i do way more than that before hitting 60%
FaceTime issues shouldn't be signal related. I have full bars and have high wifi speeds. I'll try Facetiming with my Macbook and no issues, I try with my iPod and iPad and no issues either, it's only my iPhone that has these issues. I've also asked my gf to FaceTime me at both my email and phone and I get mixed results all the time, it tends to get frustrating.
The flickering light I've only seen a few times, and it's on the front camera.
As far as the connection is concerned, I've read of Sprint users on other phones having faster speeds than those with the 4s. I can have full bars and get lower speeds than a person on the same network but different phone, while the person is next to me. I've actually had this demo with the Sprint rep that sold it to me. he took out his phone, I took out mine and he killed me.
I understand usage will vary on the handset, but I still believe it's a software issue. There's days when I don't do anything on it, and the battery drains fast. Then there's days in which I'm completely baffled at how long it lasts.
To sum it up in one word: INCONSISTENCY
At times iMessages are fast... at times they're slow
At times FaceTime is great.... moments later it won't receive anything
At times my battery life is great.... other times I can see it dissolve in front of my eyes by me just holding it.
I've performed all the recommended actions, done all the tweaks, and it doesn't seem to work. I'll wait to see what this next update does to solve some of these issues before I turn return it.
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This is true. Sometimes my 4S lasts 20 minutes at 1%, sometimes 2 minutes.
And this goes back to my comment about the issues being iOS related and how the entire experience has been 'inconsistent'.
At times I love it, at times I hate it.
I expect much more from Apple.