Xiaomi's Mi Mix 3 was announced in China on 25 October 2018, with a UK launch anticipated any day now. So surely it's too early to talk about the next generation, right? Wrong.

In previous years Xiaomi has announced two Mi Mix models per year in a sort of tick-tock cycle: a major upgrade toward the end of the year, followed by an 'S' model in Spring that improves performance and a handful of features within the phone. The Mi Mix 2S, for example, added to the Mi Mix 2 a faster processor, enhanced photography features and wireless charging.

So while early whispers of the next Mi Mix refer to a Mi Mix 4, the reality is we are unlikely to see that phone announced until the end of 2019. But we will almost certainly see a Mi Mix 3S announced in March, and on sale in April. That means we could see it around the same sort of time as the upcoming Mi 9.

When is the Mi Mix 4 coming out?

Mi Mix 3S release date: March 2019 (TBC)

Mi Mix 4 release date: October 2019 (TBC)

How much will the Mi Mix 3S and Mi Mix 4 cost?

Pricing typically stays pretty constant with Xiaomi devices, so where the Mi Mix 2S is priced at £519 but has been selling at £399 over the past couple of months (see best Xiaomi deals), and Mi Mix 3 is tipped to come in at around £499, we'd expect the Mi Mix 3S to also cost circa-£500.

Mi Mix 4 should also hit a similar budget but this is, of course, dependent on what new features it introduces, and there has been talk of a foldable screen, so for now it is too early to accurately guess.

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What to expect from the Mi Mix 3S and Mi Mix 4 - features & specifications

A research note from Hong Kong's GF Securities points to a Qualcomm Snapdragon 855, three rear cameras and a periscope lens (which allows for greater optical zoom) for the Mi Mix 4. But could we see them sooner in the Mi Mix 3S?

The processor, certainly. Previous 'S' model upgrades have seen a processor bump, and successor to the Snapdragon 845 seen in the Mi Mix 3 is indeed the Snapdragon 855. Given that Xiaomi is introducing a 5G version of the Mi Mix 3, it makes sense that it will pair the Snapdragon 855 processor with the X50 modem in order to ensure compatibility with the next-gen network in the upcoming phone.

In Mi Mix 2S Xiaomi also added a second lens to the rear camera assembly, so it's not out of the question for it to add a third lens in Mi Mix 3S.

Also tipped for the next Mi Mix is a foldable screen, and Xiaomi is indeed said to be working on such a device with renowned tipster @evleaks sharing a video of a foldable Xiaomi phone/tablet (below) but unable to vouch for its authenticity. However, we think any major design changes such as this will be held back for the Mi Mix 4, or another line entirely, and sources claim Xiaomi has not yet made any decisions either way.

Neither do we expect to see the in-display fingerprint sensor brought in with the Mi 8 Pro added to the Mi Mix 3S: not only would it add to the cost, but we imagine that it would be less compatible with the current sliding-screen mechanism.

The sliding screen may see some new functionality and fine tuning, but in other respects the Mi Mix 3S' specification is expected to be very similar to that of the Mi Mix 3. So, you should expect to find a 6.39in Full-HD+ AMOLED screen, MIUI 10, 6GB of RAM as standard with 8GB- and 10GB RAM options available, 128- or 256GB of non-expandable storage, USB-C (for audio, data transfer and charging), a circa-3,200mAh battery, a rear fingerprint sensor and a 24Mp + 2Mp dual-lens selfie camera. We'd also expect the dedicated button on the left edge for calling up the Mi AI voice assistant (or the Google Assistant on UK models) to remain.

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