Next week’s big iPhone 6s and iPhone 6s Plus unveiling is easily the most hotly anticipated tech event of the year among Apple fans. Tens of millions of people around the world are waiting with bated breath to see what Apple has in store for its next-generation iPhone lineup.

Of course, we already know just about everything there is to know thanks to a series of reports from multiple reliable Apple insiders, so there likely isn’t much mystery left for enthusiastic tech fans who follow the latest news. On the plus side, Apple’s next iPhones will feature better cameras, faster processors and twice as much RAM as last year’s models. There’s also some bad news, though: The iPhone 6s and 6s Plus will be thicker than their predecessors, and they won’t pack bigger batteries.

Before we get too far ahead of ourselves, let’s stop for a moment to take a look back at Apple’s previous “S” updates.

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While Apple did debut two new iPhones instead of one for the first time in 2014, the company is definitely a creature of habit when it comes to its iPhone lineup. First, it launches an iPhone with a new design, then it releases an updated version of the same phone the following year. We saw it with the iPhone 3GS, the iPhone 4S and the iPhone 5s, and now history is about to repeat itself with the iPhone 6s.

USA Today posted a nice quick video this week that takes a look back at each of Apple’s three previous “S” upgrades, and then discusses what the rumor mill suggests we’re about to see from Apple’s iPhone 6s.

Every other year, Apple’s “S” phones get more power and upgraded internal components along with one key feature. With Apple’s first “S,” the iPhone 3GS, it was faster data speeds. The iPhone 4S introduced us to Siri, and then the iPhone 5s got Touch ID. With the iPhone 6s, it looks like Force Touch is going to be the star of the show, though it remains to be seen exactly how Apple plans to implement it.

The full segment is embedded below.

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