Redmi K90 vs Redmi A3x comparison

Show Only Differences Highlight Differences	Redmi K90	Redmi A3x
key specs
Display	6.59-inch	6.71-inch
Processor	Snapdragon 8 Elite	-
Front Camera	20-megapixel	5-megapixel
Rear Camera	50-megapixel + 50-megapixel + 8-megapixel	8-megapixel + Unspecified
RAM	16GB	3GB, 4GB
Storage	1TB	64GB, 128GB
Battery Capacity	7,100mAh	5000mAh
OS	Android 16	Android 14
Resolution	1,156x2,510 pixels	720x1650 pixels
general
Brand	Redmi	Redmi
Model	K90	A3x
Release date	October 23, 2025	June 5, 2024
Launched in India	No	No
Form factor	Touchscreen	Touchscreen
Dimensions (mm)	157.49 x 75.25 x 8.00	168.30 x 76.30 x 8.30
Weight (g)	206.00	199.00
IP rating	IP68	-
Battery capacity (mAh)	7,100	5000
Removable battery	No	No
Fast charging	100W Fast Charging	-
Colours	White, Black, Aqua Blue, and Light Purple	Aurora Green, Midnight Black, Moonlight White
Wireless charging	-	No
display
Refresh Rate	120 Hz	90 Hz
Screen size (inches)	6.59	6.71
Touchscreen	Yes	Yes
Resolution	1,156x2,510 pixels	720x1650 pixels
Resolution Standard	-	HD+
hardware
Processor	octa-core	-
Processor make	Snapdragon 8 Elite	Unisoc T603
RAM	16GB	3GB, 4GB
Internal storage	1TB	64GB, 128GB
Expandable storage	No	Yes
Expandable storage type	-	microSD
Expandable storage up to (GB)	-	1024
camera
Rear camera	50-megapixel (f/1.88) + 50-megapixel (f/2.2) + 8-megapixel (f/2.2)	8-megapixel + Unspecified
No. of Rear Cameras	3	2
Front camera	20-megapixel	5-megapixel
No. of Front Cameras	1	1
Pop-Up Camera	No	No
Front flash	Yes	-
software
Operating system	Android 16	Android 14
Skin	HyperOS 3	MIUI 14
connectivity
Wi-Fi 7	Yes	-
GPS	Yes	Yes
Bluetooth	Yes, v 5.40	Yes, v 5.40
NFC	Yes	-
USB Type-C	Yes	Yes
Wi-Fi	-	Yes
Wi-Fi standards supported	-	802.11 ac
Active 4G on both SIM cards	-	Yes
sensors
In-Display Fingerprint Sensor	Yes	-
Compass/ Magnetometer	Yes	-
Proximity sensor	Yes	-
Accelerometer	Yes	-
Ambient light sensor	Yes	-
Gyroscope	Yes	-
Fingerprint sensor	-	Yes

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