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Non-S = new design, S = same design but about twice as fast as its predecessor. I've had a 3GS and now the 4S, but there's something about both approaches. It's simply a matter of preference.

Twice as fast???? I don't think so. I am on the non S cycle and my wife is on the S cycle and I do find the S to be an upgrade but nowhere near twice as fast.
 
Twice as fast???? I don't think so. I am on the non S cycle and my wife is on the S cycle and I do find the S to be an upgrade but nowhere near twice as fast.

It is though. CPU is about twice as fast, and GPU-wise it's not even in the same league (assuming you're talking 4 vs 4S). The 4 just isn't all that quick. Only barely faster than a 3GS really.

3G vs 3GS same story.
 
I'm a serial upgrader, but if you can't do that the. I'd suggest getting on the non-S cycle. The S models have always been completely underwhelming upgrades hardware wise. Now hopefully there are some great refinements in iOS 7, but that's a different story.
 
Have went through all of them.
New model generation is always exciting.
A upgrades are cool for a little bit. You realize it's a bit snappier and go gaga over it for a month, then you come to grips with reality and pretty quickly don't care for it.
 
Which S series iPhone had any problems at all?

To me, the S series seems like a conclusion of the series and hence the best version. The non-S series feels like a beginning and it maybe potentially problematic... antennae-gate, scratch-gate, etc...

Plus, I don't want to have an iPhone 5, when I know there is going to be an exactly the same phone with much better specifications and all the problems fixed. I'd rather wait.
There are definitely posts of people with 4S phones that keep on claiming that that particular model has noticeably worse battery life than other models they had. That's not really saying that much, given that even that is somewhat subjective, but there are those with issues nonetheless. There are new components in S models, even though there are less of them than in non-S models, so there can definitely be issues with those, even if mathematically the chances are somewhat less simply due to the fact that there's usually no external redesign (so far).

In the end "better" is still a relative and a subjective term, so while in some sense S models can be seen as "better", in other senses and/or to other people that might not necessarily be the case.
 
I've had a 3G a 4 and now a 4s. I actually regret upgrading from the 4 only because I think my 4s has battery issues. My upgrade is in June and I don't know if I want the 5 or wait for the new one...
 
I started with the 3G, skipped the 3GS, and got the 4 after dabbling in WP7 (love the OS, hated the Samsung Focus). I then found a great deal on a 4S off contract and bought it and sold my 4, and have been rocking with it since. It's amazing how much faster the single-to-dual core change was. My mom's iPhone 4 feels like a dinosaur to the 4S (can only imagine the 5). I'm off contract with AT&T and am awaiting the 5S. I feel like the S cycle has many benefits to customers, as Apple works through manufacturing issues with a new design and internals for a year, and the customer gets a more refined product. One of the biggest manufacturing issues for the 5 for me is the soft aluminum and anodization that wears away. I do not like that, and hope that's fixed for the 5S.

For me, while I'd absolutely love a bigger screen (same height and more width would be dope), a revamped iOS 7 and subsequent jailbreak, larger sensor and enhanced camera features, NFC, base model at 32GB, 2GB RAM, and better battery life would be great and would most likely keep me away from the One, Xperia Z, and S4.
 
I have a 4, my girlfriend a 4s. Her phone is better at almost everything. That being said, I've had mine for over two years, and she's had her phone less than a year.

Each release will bring improvements, but the real factor is time. Every top model has less than a year at the top, so if you're gonna even think about specs when buying you have to get it right at release to maximize value.
 
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