I remember seeing early previews of the s4 and noticing lag and stutter too. Everyone chocked it up to early software. But now that it's out it still seems to be an issue.
I can safely say I have yet to experience stutter of any kind on the One. Wonder what it is about the s4... Touch wiz?
Does it still lag or stutter for those with s4's that are running nova launcher?
It's better with nova, but yes it seems to be touchwiz and samsung services / apps / features that are to blame.
Just comparing memory usage between the one and the same apps open on the S4; the One runs at around 580-650mb the S4 1.2-1.5gb
A dramatic increase in memory usage for the exact same apps to be open, so clearly 'apps' themselves are not to blame so it can only leave Touchwiz and samsungs app services that are eating their way in the background.
Physically turning off all the gesture and scroll features and manually going into the app management and disabling samsungs apps helps indeed, proving they are mostly to blame.
Samsung added 'a ton' of features - but seemingly was too lazy to 'optimise' any of them or check that they didn't cause OS jitters.
This can be fixed in a software update, but really it shouldn't have come out of production software without the optimisation and it is frustrating.
Nova and other launchers mitigate things, as does turning off all the 'extra's ' but then at the end of the day what are you left with ?
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http://forum.xda-developers.com/showthread.php?t=2256651
Looks like the red tint and/or smearing are known issues. I haven't read the whole thread but probably another software screw-up by Samsung. They ought to fix this with a future update.
On the whole, the impression I get from reading the xda forum is that this phone was rushed to the market before all the bugs were fixed. I think Samsung should have taken its time to ensure that everything was in order before selling such a powerful and complex device.
There also seem to be some QC issues (as expected for early units) so if any of you suspect hardware faults with your s4, you should be able to get it exchanged.
Yes I posted in my first impressions was that the screen liked to pick up finger prints.
Adding a better oleophobic coating should have been Samsung's fix - not air gestures.
I would definetly recommend anyone with the phone pick up Spigen SGP Steinheill Glas.T slim screen protector. It improves sunlight viewing and has a better oleophobic coating that samsung screen does naturally.
It's pricy for a screen protector but totally worth it.