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Original -> 3GS -> BlackBerry Bold 9900 (stupid) -> Nexus One -> 4 -> Bold 9900 (Didn't learn the first time) -> 3GS -> Windows Phone 7 -> iPhone 4S -> 5s -> 6S Plus.

I have an obsession with opening new products, which influenced by constant switching. But I've been on iPhone for the better part of 3 years now haha.
 
My smartphone process went: Palm Treo 600 -- Palm Treo 700w -- HTC 6800 (Windows) -- Blackberry Curve -- Blackberry Storm -- Motorola Droid -- iPhone 4 (first Verizon) -- Motorola RAZR -- iPhone 4s -- iPhone 5 -- LG G2 -- HTC M8 and now upgrading to the iPhone 6S Plus (64gb)

I had a few one off phones in there too from trades, etc, but never kept any long enough to make the above list.
 
Went from a 5c (first smartphone after having a Blackberry years ago) to a 4 after shattering the screen and now going from a shattered 4 screen to a 6s! I cannot wait!
 
3GS -> 5 -> 6S+

The 3GS was a tank and I only upgraded because I liked the 5. My 5 lasted 2 years before I needed to crack it open and replace the dock connector. This summer the replacement microphone started to fail so I decided to upgrade to the 6S+ as opposed to replacing the dock connector again. I am excited for the new phone but the huge screen might take some getting used to.
 
Went from the iPhone 4, skipped the 5 and 5S, currently have the 6+ and getting the 6S+. Reselling my 6+ for $450, best way to do it
 
Original iPhone - 3G - 4 - 5 - 6 - 6s Plus. I've always skipped the S cycle until this year...doing AUP so will be upgrading every year now.
 
I went HTC (some android, don't remember which) --> iPhone 4 --> 5 --> 6S.
 
Now that many of us have watched our order status change from "Preparing for shipment" to "Shipped" I was curious as to what devices you have decided to upgrade from?

I started with a 3GS, then a 4. I planned to stay on the 4, but then I moved from BCN to MEX, and Telcel wouldn't let me use my unlocked 4 with its network, so I got a 4S. When my wife's BB went dead, I gave her my 4S and got a 5. A week after the 6 came on sale my 5's screen broke, so I "had to" upgrade although I didn't planned to.

I'm sitting the 6S, and maybe will upgrade next year.
 
Going from a Galaxy Note 4 to an iphone 6s+. This will be my first iPhone, I have owned several ipods and iPod nanos over the years so I didn't really feel the need to get an iPhone. I also really liked android a lot but I think i'm ready to make the switch. Just updated my iPad air to ios 9 so I think i'm ready for my phone, pretty excited.
 
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