LG G3 vs LG K61 vs Samsung Galaxy A21

General Info

Manufacturer
LG	LG	Samsung
Announced
May 2014	February 2020	2020, April 8
Status
Available - June 2014	Coming Soon - March 2020	Coming soon. Exp. release 2020, April
Colors
Black, White, Gold	Titanium, White, Blue	Various
Form Factor
Candybar	Candybar	Candybar
Dimension
146.3 x 74.6 x 8.9 mm (5.76 x 2.94 x 0.35 in)	164.5 x 77.5 x 8.4 mm (6.48 x 3.05 x 0.33 in)	-
Weight
149 g (5.26 oz)	-	-
SIM Type
-	Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)	Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)
2G Network
GSM 850 / 900 / 1800 / 1900 LTE - CDMA version	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM only)
3G Network
HSDPA 850 / 900 / 1700 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 1700(AWS) / 1900 / 2100
4G Network
LTE 800 / 900 /1800 / 2100 / 2600	LTE (unspecified)	LTE
Messaging
SMS, MMS, EMail, IM
Build Features
-	- Fingerprint Sensor MIL-STD-810G compliant	- Fingerprint Sensor Glass front, plastic back, plastic frame

OS
Android OS, v4.4.2 (KitKat)	Android 10.0	Android 10.0
Processor
Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801	Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm)	Octa-core (4x2.35 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53), Mediatek MT6765 Helio P35 (12nm)
GPU
Adreno 330	PowerVR GE8320	PowerVR GE8320
RAM
2 GB	4 GB	3 GB
Internal Memory
16 GB ROM	128 GB	64 GB
External Memory
microSD, up to 128 GB	microSDXC (dedicated slot)	microSDXC (dedicated slot)

Type
True HD-IPS + LCD capacitive touchscreen	IPS LCD Capacitive Touchscreen	HD+ Super AMOLED Capacitive Touchscreen
Colors
16M colors	16M colors	16M colors
Size
5.5 inches	6.5 inches	6.5 inches
Resolution
1440 x 2560 pixels (534 ppi)	1080 x 2340 pixels (396 ppi)	720 x 1600 pixels (270 ppi)
Screen-to-Body Ratio
76.42%	81.55%	-
Multi-Touch

Rear Camera
13 MP, 4160 x 3120 pixels	48 MP + 8 MP + 2 MP + 5 MP	16 MP + 8 MP + 2 MP + 2 MP
Flash
LED Flash	LED flash	No
Features
Auto focus, Simultaneous Video And Image Recording, Geo-tagging, Face Detection, HDR, OIS	48 MP, (wide), PDAF 8 MP, (ultrawide) 2 MP (macro) 5 MP (depth) panorama, HDR	16 MP, f/1.9, 28mm (wide), AF 8 MP, f/2.2, 12mm (ultrawide) 2 MP, (macro) 2 MP, (depth) panorama, HDR
Video
Yes, 2160p@30fps, 1080p@60fps, HDR, stereo sound rec., video stabilization	2160p@30fps, 1080p@30fps	1080p@30fps
Front Camera
Yes, 2.1 MP, 1080p@30fps	16 MP, f/2.0 HDR 1080p@30fps	13 MP HDR 1080p@30fps

GPRS
Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps	Yes	Yes
Edge
Class 12	Yes	Yes
3G
HSDPA, 42 Mbps; HSUPA, 21 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL/ EV-DO Rev. A, up to 3.1 Mbps	HSPA 42.2/5.76 Mbps, LTE-A	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
Bluetooth
Yes, v4.0 with A2DP, LE	5.0, A2DP, LE	5.0, A2DP, LE
Wi-Fi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot	Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
USB
Yes, microUSB v3.0 (SlimPort), USB On-the-go, USB Host	2.0, Type-C 1.0 reversible connector	2.0, Type-C 1.0 reversible connector, USB On-The-Go
GPS
Yes, with A-GPS support and GLONASS	Yes, with A-GPS	Yes, with A-GPS, GLONASS, BDS
Browser
HTML5	Yes	Yes

Type
Li-Ion Battery	Non-removable Li-Po Battery	Non-removable Li-Po Battery Fast battery charging 15W
Capacity
3000 mAh	4000 mAh	4000 mAh
Stand by
-	-	-
Talk Time
-	-	-