LG G8X ThinQ vs Samsung Galaxy S21 FE 5G: A Detailed Comparison

The LG G8X ThinQ, though older, remains a compelling option due to its unique Dual Screen accessory and impressive battery life. The Samsung Galaxy S21 FE 5G, a more recent release, aims to deliver a flagship experience at a more accessible price point. This comparison dissects the key differences between these two devices, focusing on performance, display quality, camera capabilities, and battery endurance to determine which phone best suits your needs.
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🏆 Quick Verdict

For the average user prioritizing future-proofing and a more refined software experience, the Samsung Galaxy S21 FE 5G is the better choice. Its Snapdragon 888 (or Exynos 2100) offers a significant performance leap over the G8X's Snapdragon 855, despite slightly lower battery endurance. However, the G8X's exceptional 111-hour endurance rating remains a strong argument for those prioritizing longevity.

PHONES
Phone Names LG G8X ThinQ Samsung Galaxy S21 FE 5G
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 28, 32, 38, 39, 40, 411, 2, 3, 4, 5, 7, 8, 12, 17, 20, 26, 28, 32, 38, 40, 41, 66 - International
5G bands-1, 3, 5, 8, 20, 28, 38, 40, 41, 66, 78 SA/NSA/Sub6 - International
SpeedHSPA 42.2/5.76 Mbps, LTE Cat20 1960/75 MbpsHSPA 42.2/5.76 Mbps, LTE (5CA) Cat19 1600/200 Mbps, 5G
TechnologyGSM / CDMA / HSPA / EVDO / LTEGSM / CDMA / HSPA / EVDO / LTE / 5G
 1, 2, 3, 4, 5, 7, 12, 14, 20, 29, 30, 38, 39, 40, 41, 46, 66 - USA41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - USA
Launch
Announced2019, September 06. Released 2019, November 012022, January 04
StatusDiscontinuedAvailable. Released 2022, January 07
Body
BuildGlass front (Gorilla Glass 6), glass back (Gorilla Glass 5), aluminum frameGlass front (Gorilla Glass Victus), plastic back, aluminum frame
Dimensions159.3 x 75.8 x 8.4 mm (6.27 x 2.98 x 0.33 in)155.7 x 74.5 x 7.9 mm (6.13 x 2.93 x 0.31 in)
SIM· Nano-SIM· Nano-SIM + Nano-SIM· Nano-SIM· Nano-SIM + Nano-SIM
Weight192 g (6.77 oz)177 g (6.24 oz)
 IP68 dust/water resistant (up to 1.5m for 30 min) MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditionsIP68 dust/water resistant (up to 1.5m for 30 min)
Display
ProtectionCorning Gorilla Glass 6Corning Gorilla Glass Victus
Resolution1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
Size6.4 inches, 100.5 cm2 (~83.3% screen-to-body ratio)6.4 inches, 100.5 cm2 (~86.7% screen-to-body ratio)
TypeOLED, HDR10Dynamic AMOLED 2X, 120Hz, HDR10+
 Always-on displayAlways-on display
Platform
CPUOcta-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - Version 1Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - Version 2
ChipsetQualcomm SM8150 Snapdragon 855 (7 nm)Qualcomm SM8350 Snapdragon 888 5G (5 nm) - Version 1Exynos 2100 (5 nm) - Version 2
GPUAdreno 640Adreno 660 - Version 1Mali-G78 MP14 - Version 2
OSAndroid 9.0 (Pie), upgradable to Android 12Android 12, up to 4 major Android upgrades, One UI 8
Memory
Card slotmicroSDXC (uses shared SIM slot) - dual-SIM modelNo
Internal128GB 6GB RAM128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM
 UFS 2.1-
Main Camera
Dual12 MP, f/1.8, 27mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, OIS 13 MP, f/2.4, 9mm (ultrawide), 1.0µm-
FeaturesDual-LED dual-tone flash, HDR, panoramaLED flash, auto-HDR, panorama
Single3.15 MP, AF32 MP, f/2.2, 26mm (wide), 1/2.74", 0.8µm
Triple-12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS 8 MP, f/2.4, 76mm (telephoto), 1/4.5", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP, f/2.2, 13mm, 123˚ (ultrawide), 1/3.0", 1.12µm
Video4K@30/60fps, 1080p@30/60/240fps, 24-bit/192kHz stereo sound rec., gyro-EIS4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, gyro-EIS
Selfie camera
FeaturesHDRHDR
Single32 MP, f/1.9, 26mm (wide), 1/2.8", 0.8µm32 MP, f/2.2, 26mm (wide), 1/2.74", 0.8µm
Video4K@30fps, gyro-EIS4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound
3.5mm jack YesNo
35mm jackYesNo
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
 32-bit/192kHz audio 24-bit/192kHz audio recording Tuned by Meridian Audio32-bit/384kHz audio
Comms
Bluetooth5.0, A2DP, LE, aptX HD5.0, A2DP, LE
NFCYesYes
PositioningGPS, GLONASS, GALILEO, BDSGPS, GLONASS, BDS, GALILEO
RadioFM radioUnspecified
USBUSB Type-C 3.1, OTGUSB Type-C, OTG
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNAWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Features
BrowserHTML, Adobe Flash-
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compass, barometerFingerprint (under display, optical), accelerometer, gyro, proximity, compass
 -Bixby natural language commands and dictation Samsung Pay (Visa, MasterCard certified) Samsung DeX (desktop experience support)
Battery
Charging21W wired, PD, QC3 9W wireless25W wired, PD3.0, 50% in 30 min 15W wireless Reverse wireless
Talk timeUp to 12 h (multimedia)-
TypeLi-Po 4000 mAh, non-removableLi-Ion 4500 mAh
Misc
ColorsNew Aurora BlackWhite, Graphite, Lavender, Olive
ModelsLMG850EMW, LM-G850, 901LG, LM-G850NSM-G990B, SM-G990B/DS, SM-G990U, SM-G990U1, SM-G990W, SM-G990E, SM-G9900, SM-G990B2, SM-G990U2, SM-G990W2, SM-G990U3
PriceAbout 560 EUR€ 199.00 / $ 143.95 / £ 154.99 / ₹ 29,990
SAR1.12 W/kg (body)     0.77 W/kg (head)     0.90 W/kg (body)
SAR EU0.90 W/kg (head)     0.95 W/kg (head)     1.48 W/kg (body)
Tests
Audio quality Noise -93.2dB / Crosstalk -93.4dB-
Battery life Endurance rating 111h Endurance rating 92h
Camera Photo / Video Photo / Video
Display Contrast ratio: Infinite (nominal) Contrast ratio: Infinite (nominal)
Loudspeaker -24.9 LUFS (Very good) -26.9 LUFS (Good)
Performance AnTuTu: 339726 (v7), 411980 (v8) GeekBench: 11251 (v4.4), 2870 (v5.1) GFXBench: 38fps (ES 3.1 onscreen) AnTuTu: 566529 (v8), 719696 (v9) GeekBench: 3049 (v5.1) GFXBench: 56fps (ES 3.1 onscreen)

LG G8X ThinQ

  • Exceptional battery life (111h endurance)
  • Unique Dual Screen accessory potential
  • More affordable price point (likely)

  • Older Snapdragon 855 chipset
  • Lower display brightness
  • Potentially limited software updates

Samsung Galaxy S21 FE 5G

  • Powerful Snapdragon 888/Exynos 2100 chipset
  • Brighter and more vibrant display
  • Faster charging and wireless charging

  • Shorter battery life (92h endurance)
  • Potential for Exynos variant throttling
  • Higher price point

Display Comparison

The Samsung Galaxy S21 FE 5G boasts a significantly brighter display, reaching 792 nits compared to the LG G8X ThinQ’s 603 nits. This translates to better visibility under direct sunlight. Both displays share an 'Infinite' (nominal) contrast ratio, suggesting deep blacks typical of OLED panels. While neither specifies refresh rate, the S21 FE’s panel is likely more color accurate and benefits from Samsung’s display calibration expertise. The G8X’s lower brightness may be noticeable for users consuming HDR content or working outdoors.

Camera Comparison

Both phones offer photo and video capabilities, but detailed sensor information is lacking for the G8X. The S21 FE’s camera system likely benefits from Samsung’s advanced image processing algorithms. While sensor size and aperture details are unavailable, the S21 FE’s more modern ISP (Image Signal Processor) within the Snapdragon 888 or Exynos 2100 will deliver superior image quality, especially in low-light conditions. The G8X’s camera is likely competent, but will fall behind the S21 FE in dynamic range and detail. The presence of a 2MP macro camera on the G8X is unlikely to significantly impact overall image quality.

Performance

The core difference lies in the chipsets. The Galaxy S21 FE 5G utilizes either the Qualcomm Snapdragon 888 (5nm) or the Exynos 2100 (5nm), both built on a smaller, more efficient node than the LG G8X’s Snapdragon 855 (7nm). This translates to a substantial performance advantage for the S21 FE, particularly in GPU-intensive tasks. The S21 FE’s CPU, featuring a Cortex-X1 prime core, further enhances responsiveness. While the G8X’s Snapdragon 855 remains capable for everyday tasks, it will struggle with demanding games and multitasking compared to the S21 FE. The 5nm process also implies better thermal management, potentially reducing throttling during sustained workloads.

Battery Life

The LG G8X ThinQ shines in battery endurance, achieving a remarkable 111-hour rating. The Samsung Galaxy S21 FE 5G, with a 92-hour rating, lags behind. However, the S21 FE compensates with faster charging – 25W wired with 50% charge in 30 minutes, compared to the G8X’s 21W. The S21 FE also adds 15W wireless charging and reverse wireless charging, features absent on the G8X. While the G8X offers longer runtimes, the S21 FE’s faster charging mitigates the difference for many users.

Buying Guide

Buy the LG G8X ThinQ if you absolutely need maximum battery life and are intrigued by the Dual Screen functionality, and are comfortable with an older chipset and potentially limited software updates. Buy the Samsung Galaxy S21 FE 5G if you prioritize performance for gaming and demanding applications, a brighter and more modern display, and a more up-to-date software experience with longer guaranteed updates.

Frequently Asked Questions

❓ Does the Exynos 2100 version of the S21 FE suffer from overheating or throttling during extended gaming sessions?
The Exynos 2100 variant of the S21 FE has been reported to run warmer and exhibit more throttling than the Snapdragon 888 version, particularly during prolonged, demanding tasks like gaming. However, Samsung implemented software optimizations to mitigate this issue, and the throttling is generally manageable for most users. The 5nm process still offers improved efficiency compared to the G8X's 7nm Snapdragon 855.
❓ Is the Dual Screen accessory for the LG G8X ThinQ worth the investment, and what are its practical use cases?
The Dual Screen accessory significantly expands the G8X’s functionality, effectively turning it into a portable dual-monitor setup. Practical use cases include multitasking – running a video call on one screen while taking notes on the other – and gaming with dedicated controls on the second screen. However, the accessory adds bulk and requires an additional purchase, making it a niche appeal for power users.
❓ How does the charging speed of the S21 FE compare to real-world usage? Does the 25W charger fully charge the phone in under an hour?
Samsung claims a 50% charge in 30 minutes with the 25W charger. Real-world testing indicates a full charge typically takes around 55-65 minutes. While not a full hour, it's considerably faster than the LG G8X's 21W charging, offering a quicker top-up when time is limited.