Compare the Samsung Galaxy A40 to the Samsung A50
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Screen and design
A40: compact, 5.9-inch screen
Thanks to the 5.9-inch screen, the Samsung Galaxy A40 is easy to hold. The quality is also excellent with a Full HD resolution. Although many smartphones in the same price range have an LCD screen, the A40 has a sAMOLED screen, which makes the colors extra vivid. The plastic rear changes color whenever light falls on it. The fingerprint scanner is also on the back. Like the A50, the A40 comes in 4 colors: black, white, blue, and orange.
A50: 6.4-inch screen with fingerprint sensor
The Samsung A50's 6.4-inch screen is a lot larger. It's great when you love watching videos or playing games. The smartphone is a little harder to hold when you have smaller hands, though. Like the A40, the A50 has a Full HD sAMOLED screen, so you can watch your favorite series in razor-sharp detail. An important difference with the A40 is that the fingerprint scanner is not on the back, but underneath the screen.
Camera
A40: wide-angle lens and good selfie camera
With a total of 3 cameras (2 rear, 1 front), the Samsung A40 is quite versatile. Besides the standard camera (16 megapixels), the device has a camera with wide-angle lens (5 megapixels) on the back. This wide-angle lens allows you to capture a larger area than with a standard lens. It's ideal for impressive photos of a large building or capturing a large group of people in 1 frame. The front camera has the most megapixels (25), so your selfies are also sharp.
A50: extra camera and more megapixels
The Samsung Galaxy A50 has 1 more camera (3 rear, 1 front). The A50 uses that extra rear camera to measure depth. This gives your pictures more detail and lets you create a bokeh effect, which means the foreground is sharp, but the background is blurry. This looks better than with the A40, which uses software to add that effect. In addition, the A50 has a few more megapixels on the back (25 and 8), so you'll get slightly sharper photos. Like with the A40, you can record videos in Full HD.
Battery
A40: 3100mAh battery with fast charging
The Samsung A40 has a battery with a capacity of 3100mAh. That's slightly below average, but the compact screen uses less power as well. This means you'll make it to the end of the day without having to charge it in between. When you do need to charge it, Samsung Fast Charge (15W) will make sure the battery will be filled up in no time.
A50: large 4000mAh battery with fast charging
The battery of the Samsung A50 has a 4000mAh capacity. That's comparable to that of top devices like the Note 9 and the S10 Plus. So in terms of battery life, the A50's good to go, since it might even be able to handle 2 days. That means you don't need to worry about constantly having an empty phone at night. When your A50 does run out of power, Samsung Fast Charge (15W) will charge your battery in no time.
Processing power and storage space
A40: decent specifications
The Samsung A40 is perfectly suitable for everyday use. Thanks to its 4GB of RAM, apps load fairly quickly and multitasking won't be a problem. If you want some fanatic gaming or use more demanding photo and video editing programs, the A40 will have a tough time. The Exynos 7885 processor is average at best. The 64GB memory is fine for its price range. You can store quite a lot of photos, music, and apps on it.
A50: more power and more storage space
Thanks to the powerful Exynos 9610 processor, the A50 is actually better than average. Games and other demanding apps will run more smoothly on the Samsung A50. If you often take photos and record videos and edit them, the A50 will feel a lot faster. On top of that, its 128GB of memory gives you twice as much space to store all those photos and videos. That extra memory space also comes in handy if you download a lot of music, movies, and apps.
Conclusion: A40 or A50?
The Samsung A50 is better than the A40 in almost every area. On the other hand, if you want a smartphone that's not too big, but does have an excellent screen, you should go with the Samsung A40. Is it more important to you that your smartphone's nice and fast, has enough storage space, and lasts a long time on a single charge? Then the A50 will have you covered.