Samsung Galaxy A21s vs Xiaomi Redmi 9, which one should I stick with?

We face two cheap smartphones that have a lot to say.

Cheap smartphones are becoming more competitive and solvent every year. Fortunately, if you want to spend about 100 euros on your new mobile, you have an important variety of alternatives that can be a good purchase.

This time we compare two terminals of quite different firms. On the one hand the Samsung Galaxy A21s, on the other, the Redmi 9 by Xiaomi. We are talking about quite cheap smartphones, which struggle to offer an attractive set of specifications at a good price. But, Which of them is the best buy? We compare all its features and try to answer the question.

Samsung Galaxy A21s and Redmi 9

Two cheap smartphones that have a lot of war to fight.

Design and display

The Redmi device incorporates a 6.53-inch IPS screen and Full HD + resolution. It is quite simple, but with quite recognizable design lines. It comes with a nice plastic body that you can find in various colors and a rear fingerprint reader. It is of moderate size, light and very pleasant in the hand.

The Samsung Galaxy A21s arrives with a 6.5-inch IPS screen and HD + resolution, which leaves us with a density of 270 pixels per inch. Its front is well used, with a small chin and a hole for the front camera. Again we find plastic and a back available in various colors. It also incorporates a traditional fingerprint reader.

Cameras: 4 sensors that are a standard

He Redmi 9 It arrives with 4 sensors on its back: we ran into a 13 megapixel main sensor, a wide angle 8 megapixel, a macro sensor 5 megapixel and a sensor for the portrait mode 8 megapixels. In the notch of its front, an 8 megapixel sensor.

If you look at the Samsung Galaxy A21s we will meet again with 4 sensors on the back: incorporates a 48 megapixel main camera, a wide angle 8 megapixel, a macro sensor 2 megapixel and a camera for the portrait mode that repeats with 2 megapixels. In the hole in its front, a 13 megapixel camera.

Battery: exceeding 5,000 mAh

Samsung Galaxy A21s, featured image

This is the rear of the Galaxy A21s.

The Redmi 9 battery reaches 5,020 mAh, with a 18W fast charge. We find features that are not very demanding, so we can expect good performance, more than decent hours of use.

The Samsung terminal arrives with a slightly smaller battery, of 5,000 mAh, and with a 15W load. As we pointed out in its analysis, you can reach the end of the day without any problem, the autonomy of this Galaxy A21s stands out from the competition.

Processor and memory: MediaTek vs Exynos

The brain of the Redmi 9 is the MediaTek Helio G80, a processor that will not give you problems on a day-to-day basis. It is a device that moves fluently in basic tasks, you can also take advantage of somewhat more demanding games and applications. You can find it in versions of 3 GB and 4 GB of RAM, 32 GB, 64 GB and up to 128 GB of storage that you can expand with the help of a microSD card.

The Korean terminal, on the other hand, houses the Exynos 850, a chip manufactured by Samsung itself. It has 8 cores capable of running at a maximum speed of 2 GHz. The Galaxy A21s is available in versions of 3 GB, 4 GB and 6 GB of RAM memory, 32 GB, 64 GB and 128 GB of internal memory. You can also expand its capacity with microSD cards.


Both arrive with the configuration that we can expect in terminals of their price. Dual SIM, Wi-Fi Direct, 4G and the rest of the basic features. They also incorporate bluetooth 5.0, which allows them to be paired with other devices, such as wireless headphones.

Despite being quite inexpensive, they enjoy NFC connectivity, which allows you to pay in all types of establishments together with applications such as Google Pay and transfer files easily and quickly. Nothing to reproach either of the two in this section.

Samsung Galaxy A21s vs Xiaomi Redmi 9, which is the best option?

You can get him Samsung Galaxy A21s by slightly less than 170 euros on Amazon. To buy the Redmi 9 you will have to pay something less, around 130 euros.

Taking into account all the features that we have discussed and the prices at which both devices can be purchased, I think Xiaomi's Redmi 9 is a better alternative. We are talking about quite similar devices, but the Redmi 9 stands out in some very important sections.

We gain a little more resolution in your panel, also more ease with the performance of your processor. In the long run, and although the difference is small, the Helio G80 could give us a little more life. In this case, our chosen one is also the cheapest, one of the best options for those looking for the best value for little money.