Head to head

Realme Narzo 100x vs Samsung Galaxy S21 5G

Full specification and price comparison for Pakistan, updated 23 Aug 2026.

The short answer

The Realme Narzo 100x is the stronger phone of the two, scoring 75 against 70 on our combined specification score. It leads on battery & charging and value for money. The Samsung Galaxy S21 5G still wins on performance and camera, so it remains the better choice if that is your priority. The Realme Narzo 100x is the cheaper of the two at PKR 78,999 against PKR 169,999.

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The verdict

Spec-derived

Realme Narzo 100x takes it by 4.6 points on our weighted spec score.

Performance Samsung Galaxy S21 5G leads

Gaming score where available, otherwise chipset tier plus usable RAM.

Camera Samsung Galaxy S21 5G leads

Camera Score where available, otherwise sensor resolution and lens count. Megapixels alone do not measure image quality.

Battery & charging Realme Narzo 100x leads

Cell capacity in mAh weighted with rated wired charging output.

Display Samsung Galaxy S21 5G leads

Pixel density, refresh rate and panel technology.

Memory & storage Samsung Galaxy S21 5G leads

Highest advertised RAM and internal storage configuration.

Value for money Realme Narzo 100x leads

Combined spec score divided by current Pakistani retail price.

What actually differs

  • Realme Narzo 100x costs PKR 91,000 less.
  • Realme Narzo 100x packs a 4,000 mAh larger battery.
  • Realme Narzo 100x charges 20W faster.
  • Samsung Galaxy S21 5G offers 2 GB more RAM.
  • Samsung Galaxy S21 5G has a 14 MP higher-resolution main sensor.
  • Samsung Galaxy S21 5G uses an OLED panel while the other sticks with LCD.

Buy the Realme Narzo 100x if…

you care most about battery & charging and value for money.

Buy the Samsung Galaxy S21 5G if…

you care most about performance, camera, display and memory & storage.

Full specification comparison

Specification Realme Narzo 100x Samsung Galaxy S21 5G
Price in Pakistan
Retail price PKR 78,999 Cheaper PKR 169,999
Design & build
Release date July 15, 2026 January 14, 2021
Dimensions 166.4 × 78.2 × 8.8 mm 151.7 x 71.2 x 7.9 mm
Weight 224 g 169 g Better
Water resistance IP65 dust and water resistance. IP68 dust and water resistant (up to 1.5 m for 30 minutes)
Display
Screen size 6.81 inches Better 6.2 inches
Resolution 720 × 1570 pixels 2400 x 1080 pixels Better
Panel type IPS LCD, 144Hz Up to 1200 nits (HBM) Dynamic AMOLED 2X Adaptive 120Hz HDR10+
Protection Panda-1681 Glass Corning Gorilla Glass Victus
Performance
Chipset MediaTek Dimensity 6300 (6 nm) Samsung Exynos 2100 (5 nm) / Qualcomm Snapdragon 888 (5 nm), depending on market
CPU Octa-core Octa-core Up to 2.9 GHz on Exynos version
GPU Mali-G57 MC2 Mali-G78 MP14 / Adreno 660, depending on chipset
Operating system Android 16, realme UI 7.0 Android 11, One UI 3.1
Memory & storage
RAM 4GB / 6GB 8GB Better
Internal storage 128GB / 256GB 128GB / 256GB LPDDR5
Card slot microSDXC, dedicated slot. No
Camera
Main camera 50 MP, f/1.8, PDAF, AI Camera, LED flash. 12MP + 64MP + 12MP, OIS, PDAF, 3x Hybrid Optical Zoom, up to 30x Space Zoom Better
Selfie camera 8 MP, f/2.0, wide-angle, 4P lens. 10MP, f/2.2, Dual Pixel PDAF LED flash, HDR, panorama Better
Video recording 1080p@30fps (rear and front), 720p@120fps slow motion. Up to 8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps
Battery & charging
Battery capacity Silicon-Carbon (Si/C) Battery 8000 mAh (non-removable.) Better Li-Ion (non-removable) 4000 mAh
Wired charging 45W SUPERVOOC wired charging, USB Power Delivery (PD) support, reverse charging, bypass charging. Better 25W wired, 15W wireless, 4.5W reverse wireless charging
Connectivity & extras
SIM Dual Nano-SIM (Nano-SIM + Nano-USIM), Dual Standby Nano-SIM + eSIM
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi 5, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac/ax, dual-band, Wi-Fi 6
Bluetooth 5.3, A2DP, LE, aptX, aptX HD, LDAC, LHDC 5.0 5.0
NFC No Yes
Sensors Fingerprint (side-mounted), accelerometer, proximity, ambient light sensor, compass, gyroscope Accelerometer, Gyro, Proximity, Compass, Barometer, Hall Sensor, Ambient Light Sensor, Ultrasonic Fingerprint Sensor
USB USB Type-C 2.0, OTG support USB Type-C 3.2 Gen 1

“Better” marks the higher (or, for price and weight, the lower) figure. It is a specification difference, not a judgement about real-world experience.

Questions people ask

Which is better, Realme Narzo 100x or Samsung Galaxy S21 5G?

Realme Narzo 100x comes out ahead on our combined spec score, leading by 4.6 points. It wins on battery & charging and value for money. Samsung Galaxy S21 5G can still be the better buy if your priorities sit elsewhere or if you find it at a lower street price.

What is the price of Realme Narzo 100x and Samsung Galaxy S21 5G in Pakistan?

Realme Narzo 100x is listed at PKR 78,999 and Samsung Galaxy S21 5G at PKR 169,999. That makes Realme Narzo 100x cheaper by PKR 91,000. Retail prices move often, so treat these as indicative.

Which has the better camera, Realme Narzo 100x or Samsung Galaxy S21 5G?

Samsung Galaxy S21 5G scores higher in our camera assessment. Realme Narzo 100x uses a 50 MP main sensor against 64 MP on Samsung Galaxy S21 5G, though sensor size and processing matter more than resolution alone.

Which phone has the better battery, Realme Narzo 100x or Samsung Galaxy S21 5G?

Realme Narzo 100x leads on battery. Realme Narzo 100x carries a 8000 mAh cell and Samsung Galaxy S21 5G a 4000 mAh cell, with 45W and 25W wired charging respectively.

Which is better for gaming, Realme Narzo 100x or Samsung Galaxy S21 5G?

Samsung Galaxy S21 5G is the stronger gaming phone here. Realme Narzo 100x runs the MediaTek Dimensity 6300 (6 nm) while Samsung Galaxy S21 5G runs the Samsung Exynos 2100 (5 nm) / Qualcomm Snapdragon 888 (5 nm), depending on market.

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Tools that use this data

Camera Score Tool Battery Score Tool Gaming Performance Checker AI Mobile Recommendation Tool All comparisons

Scores are calculated from the published hardware specification of each device using the same formula for every phone on WhatMobilePK — they are not paid placements and they are not laboratory test results. Prices are indicative Pakistani retail prices and change frequently.