Xiaomi Redmi 3S full review

Xiaomi has excelled itself with the Redmi 3S, taking the already very good Redmi 3 and fitting a newer processor and a fingerprint scanner, and tweaking the design. The resulting Xiaomi Redmi 3S has all the things that made the Redmi 3 great, including phenomenal battery life, but now it's even better. Also see our Xiaomi Redmi 3 review.

£120 really isn't a lot of money when it comes to buying a SIM-free Android phone, and you will pay much more than this for a comparable UK network-locked budget Android. But while the Redmi 3S offers incredible value at this price, it's also worth checking what deals are available on the 3S Pro. Separating the two right now is a gig of RAM, 16 gigs of storage, and just a fiver. Also see: Best cheap phones 2016.

We received our Xiaomi Redmi 3S from GearBest. Prices here can change daily, but at the time of writing the Xiaomi Redmi 3S cost £121.40 and the 3S Pro just £126.10. (The older Xiaomi Redmi 3 is more expensive than both at £126.81 - GearBest.)

Buy the Xiaomi Redmi 3S here.
Buy the Xiaomi Redmi 3S Pro here.

You won't get the Redmi 3S on a contract in the UK, but at these prices you can afford to buy the phone outright and opt for a much cheaper SIM-only tariff that ties you in only so long as you wish to be contracted. We wouldn't advise using an O2-, Giffgaff- or other mobile network's SIM that relies on the 800MHz band for 4G, however, since Xiaomi phones don't support it. The 2100- and 2600MHz 4G bands also used in the UK by other mobile networks are supported.

People can rightly be wary about buying smartphones from China, but we've never had an issue with buying from GearBest. Do note that you may have to pay import duty when shipping the Xiaomi Redmi 3S from China to the UK, however. You can read all about this and other potential pitfalls in our guide to buying grey-market tech.

Xiaomi Redmi 3S

Xiaomi Redmi 3S review: Design and build

Viewed from the front the Xiaomi Redmi 3S is identical to the Xiaomi Redmi 3. It matches the 3 in size and weight, and has the same 5in HD screen that makes it so easily manageable in a single hand. A Chrome-effect metal trim and reasonably slim bezels go some way to conceal the Redmi's budget roots, but at 8.5mm it retains the chunk that is typical of cheap smartphones. Also see: Best Android phones 2016.

The display is much lower in resolution than what you might find at the other end of the smartphone market, but an HD screen is easily justified by the price of the Redmi 3S. It's sufficiently clear nonetheless and, more importantly, it's IPS tech, which means colours are realistic, viewing angles are good, and this display technology is also a firm friend of longer battery life.

And that is one of the key selling points of this phone. Going some way to explain the chunky design (though you'd never guess just how much battery power lay inside) is a very generous 4,100mAh battery. We'll talk more about performance below, but suffice to say the Xiaomi Redmi 3S gave the best showing in our Geekbench 3 battery life we've ever seen. Also see: Best phones 2016.

Xiaomi Redmi 3S

The only visible differences between the Redmi 3 and this 3S are seen from the rear. New on this Redmi 3S is a circular fingerprint scanner, located toward the top of the phone's rear in a central position. Gone is the diamond-patterned casing at the back, which was arguably somewhat feminine-looking and also gave the phone a plasticky appearance.

The Redmi 3S feels the same in the hand, but it's more obviously built from metal than was the Redmi 3. You'll still find plastic panels top and bottom housing the camera and speaker, but that's already a lot less plastic than you'd find on most budget smartphones.

Build quality is excellent, and though this might be a cheap phone no obvious corners have been cut. As before, there's no creaking, no flexing, no sharp edges, no gaping holes - nothing to cause any concern. Our only real gripe is the rear-mounted speaker, though a small plastic protrusion helps to raise it from a flat surface.

The layout is standard for Android, with Home, Back and Multitasking capacitive buttons below the screen, a Micro-USB slot at the bottom, and headphone jack and IR blaster at the top. Power and volume buttons sit on the right side, and there's a dual-SIM tray on the left. The second SIM slot can instead be used to add a microSD card up to 128GB in capacity if you so wish. Also see: Best dual-SIM phones 2016.

Xiaomi Redmi 3S

Xiaomi Redmi 3S review: Core hardware and performance

A key change between the Xiaomi 3 and Xiaomi 3S is the processor. In place of the Snapdragon 616 you now get the Snapdragon 430, which integrates the upgraded Adreno 505 GPU where we previously saw the 405. Both are 64-bit octa-core chips, and supported by 2GB of RAM and 16GB of internal storage.

Performance in our benchmarks didn't see a huge boost, and both phones proved capable for day-to-day tasks and casual gaming. We've compared the results from each in our chart below. Also see: What's the fastest phone 2016?

One thing the Redmi 3S excells at, though, is battery life - and this may be as much down to the move from Android 5.0 to Android 6.0 as it is the new processor. Recording 11 hours 53 minutes in our Geekbench 3 battery life test, this phone has longer runtime than any other we've tested. By comparison the Redmi 3 recorded 9 hours 50 mins. If you want a budget Android phone with long battery life you will not find a better example than the Xiaomi Redmi 3S.