The Realme X is a premium offering from Realme, which features an in-display fingerprint sensor and a pop-up selfie camera, under Rs. 20,000. It features a 6.53-inch, full-HD+ OLED display that produces good colours and has adequate brightness. The in-display fingerprint sensor also works very well and there's face unlock too, which we found to be equally fast. 

The phone is powered by a Qualcomm Snapdragon 710 SoC and is available in two variants -- one with 4GB of RAM and 128GB of storage and the top-end one has 8GB of RAM and 128GB of storage. The phone runs on ColorOS 6, which is based on Android 9 Pie. The large size of the phone makes it a little cumbersome to use but other than that, the build quality is great and performance is very good. Apps and games run smoothly too, without any heating issues. 

The Realme X has a 48-megapixel primary camera that captures detailed landscapes and close-up shots and video recording can also go up to 4K resolution, which is good. The phone does a pretty good job in low light too and there's also Nightscape that helps bring out better details and colours. Battery life is also solid, as we found the phone lasting for a full day with regualr use. Fast charging is also present that helps top-up the battery quickly.