So pissed. Went to order and pay for my 6s and they told me corporate won't let us pay for devices anymore. And they won't approve me for the 6s as there isn't enough difference for business reasons to pay the $200. I would need to wait for the 7 and the 6s becomes free or if there is a case to be made for the 7 that can be justified.
Oh well, stuck for awhile.
"Good things come to those who wait"
Just be patient. You have to resist the urge and drive to upgrade "now" just because the option is there.
especially if it's for business purposes - going from the 5s to the 6 isn't much of an upgrade; it's mostly lateral. So you want to upgrade from the 5s to...a "larger 5s" for 2 more years? I dunno about that...plus for work *efficiency* the 2GB of ram helps out iOS a lot. For my line of work, I find it very useful and handy as true multitasking with apps, documents and Internet tabs that don't refresh and lose your work or your spot in filling out forms, or your emails when cross referencing something in another app etc...
I have an iPhone 6 (On iOS 8 no less) and I cannot do that level of multitasking. If anything, it is very frustrating and impedes workflow because of the refreshing apps or tabs.
My perspective is, if you're going to go for an upgrade for work, which is how you earn your living, then go with the device that will actually improve your workflow. The 6 is a minor enough upgrade from the 5s, that you won't get any more workflow out of it that you can't get from the 5s you currently own.
Plus, By waiting, you'll also see if your work will allow you to update to the 7, a cheaper 6s, or the new 4" iPhone - if the new 4" iPhone is real of course - more choice!
So bottom line -> if I were you, I would resist the urge to upgrade now, and avoid being stuck with a work phone for 2 more years that isn't going to give you any different work flow than you will get from your current phone. The 6 is still a fast, powerful phone. And it is still a great phone to get. But, so is the 5s that you currently have.
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I am on the yearly upgrade cycle.
The 3GS and the 6S are the only S phones that I really like and even then the 3GS was the only S phone I felt was as good of an upgrade as the main phones. 4S was speed that really didn't matter until iOS7 and Siri - gimmick. 5S was again speed that didn't really matter (5/5S/6 all used 1GB of RAM) and TouchID. And TouchID didn't work for me until like 5 months after launch when the software fix finally worked. 6S is only good because Apple delayed upgrading the RAM for soo long.
I wouldn't recommend getting on the S cycle because spec wise it really hasn't been that as good. Exception is with T-Mobile because every S phone seems to add more bands to improve T-Mobile service more and more.
There are advantages and disadvantages to being on either cycle; you either value a greater focus on external updates or you value a greater focus on internal updates.
The point isn't whether the "s" or "non-S" cycle is better or not, the point is what is the best phone for one's needs. People are often too fixated on "s vs non-S" when the reality is every year, every phone is a new generation. many phone carriers around the world are doing away with subsidized contracts and thus this old 2 year cycle is going to lose even more meaning. Now a days phones are Becoming powerful to the extent that one need not upgrade as frequently as in the past. It will be less about "2 year cycles" and more about "which generation makes sense for me to upgrade to next". That could be the following year or the following 4 years. The lack of subsidization will play a role when the general population, that doesn't sell their old model on kijiji or Craigslist or eBay to find the new one every year or two, are no longer paying 200$ for upgrades anymore.
For the OP, it's a work device. If they require a phone to check whatsapp or iMessage group convos and are fed up with the 5s's battery life, then the 6 is fine. Problem is, the 6 and 5s are very similar in power and in specs, and features. So from using the phone as a work phone point of view, the OP would be throwing away an upgrade to a phone which won't give them added work flow benefits. The 6s on the other hand, does give him/her benefits as the processors are upgraded enough and the ram is doubled which leads to an overall more robust experience.