T-Mobile Sidekick 4G (SGH-T839) vs LG K20 (X120HM)

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Side by side comparison between T-Mobile Sidekick 4G vs LG K20 phones, differences, pros, cons and full specifications. What's the better?

5/18/2020 11:30 AM, updated: 8/4/2020 11:54 AM

Compare LG K20 X T-Mobile Sidekick 4G (SGH-T839) 02Points

Specifications Compare Models Pictures

3.5"
TFT

480x800

3.1
MP

0.3mp

512MB
RAM

Single-core

1500
mAh

(Removable)

21Points LG K20 (X120HM) Compare T-Mobile Sidekick 4G X

Specifications Compare Models Pictures

5.45"
IPS

480x960

8
MP

5mp

1GB
RAM

Quad-core

3000
mAh

(Non removable)

What's the better phone? LG K20 (X120HM)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

2 Advantages T-Mobile Sidekick 4G (SGH-T839)	vs	21 Advantages LG K20 (X120HM)
+267 PPI36% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	197 PPI
+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily	vs	Li-Ion: lithium-ion (Non removable)
1GHz 32bit Single-core	vs	+1.5GHz 64bit Quad-core (28nm)2 times More powerful processor, you can open your applications faster
512MB	vs	+1GB LPDDR3100% More RAM memory. Typically more responsive and better for multitasking.
1GB (350MB available)	vs	+16GB (11GB available)31 times More internal storage for applications and files
Until 32GB microSD, microSDHC	vs	+Until 256GB microSD, microSDXC7 times More external storage for files using memory cards
162 grams (5.67 ounces)	vs	+152 grams (5.32 ounces)7% Lighter
15 millimeters (0.59 inches)	vs	+8.3 millimeters (0.33 inches)81% Thinner
TFT LCD	vs	+TFT IPS LCDAdvantage TFT IPS LCD display is brighter and more vivid
480x800 pixels	vs	+480x960 pixels20% Higher resolution screen
3.5"	vs	+5.45"56% Larger screen
(back) 3.1MP	vs	+(back) 8MP154% Higher resolution main camera
Not supported	vs	+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light
(front) 0.3MP	vs	+(front) 5MP15 times Higher resolution secondary camera to take pictures and selfies
VGA (720x480)	vs	+Full HD (1920x1080)5 times More image quality for recording videos with the primary camera
Android 2.2.1 Froyo	vs	+Android 9.0 PieAdvantage Android 9.0 Pie is newer and safer
3G+ HSPA+	vs	+4G LTEAdvantage The 4G LTE network is newer and faster
(3G+ HSPA+) 21 Mbps	vs	+(4G LTE) 150 Mbps6 times Faster for surfing the internet and download files
1500 mAh	vs	+3000 mAh100% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
Not supported	vs	+FMAdvantage The radio lets you listen to your songs and sports in general
3.0 + A2DP	vs	+4.2 + A2DPAdvantage Bluetooth 4.2 + A2DP is newer and faster
HTML, XHTML, Flash player	vs	+HTML, XHTML, HTML5Advantage Better sites viewing on the internet
Not supported	vs	+MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

15 Common items in both devices

16 million

Only digital zoom

Autofocus

Capacitive

Multitouch

Accelerometer

Ambient light sensor

+8 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Change model		Choose the model
Model	Sidekick 4G (SGH-T839)	K20 (X120HM)
Other model names	T-Mobile Sidekick 4G T839, Samsung SGH-T839 Sidekick 4G	LG K20 2019 LMX120HM.ATCLBK (1-SIM) , LM-X120HM (TelCel)
Country or region available	USA	(Latin America), Chile, Mexico, Peru
Brand	T-Mobile	LG
Release date	4/20/2011	8/7/2019
Depth	15 millimeters (0.59 inches)	8.3 millimeters (0.33 inches)
Size (width x height)	61 x 127 millimeters (2.4 x 5 in)	71.9 x 148.6 millimeters (2.83 x 5.85 in)
Weight	162 grams (5.67 ounces)	152 grams (5.32 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
📲 Display
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Display type	TFT LCD	TFT IPS LCD
Screen size	3.5" inches	5.45" inches
Screen-to-body ratio	~45% (screen-to-body ratio)	~71.7% (screen-to-body ratio)
Display resolution	480x800 pixels	480x960 pixels (18:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	267 PPI	197 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Not supported
Refresh rate	feature not registered	60Hz
Display features	feature not registered	Not supported
🤖 Operating System
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
System version	Android 2.2.1 Froyo	Android 9.0 Pie
Firmware update	feature not registered	feature not registered
User Interface	feature not registered	feature not registered
⚙️ Processor
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Chipset	32bit: Samsung Exynos 3	64bit: MediaTek MT6739 (28nm)
CPU	Single-core, 1 processor: 1x 1GHz ARM Cortex-A8 (Single-core)	Quad-core, 1 processor: 4x 1.5GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	PowerVR SGX540	PowerVR GE8100 MP1 (570MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
RAM memory	512MB	1GB LPDDR3
Internal storage	1GB (350MB available)	16GB (11GB available) eMMC 5.1
External storage	Until 32GB microSD, microSDHC (dedicated slot)	Until 256GB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Dual-SIM	Not supported	Not supported
SIM card	1 slot (Single-SIM) Standard mini-SIM (2FF)	1 slot (Single-SIM) nano-SIM (4FF)
Maximum Download / Upload	21/5.76 Mbps	150/50 Mbps
Network technology	2G, 3G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	UMTS 1700/2100	UMTS 850/900/1700/1900/2100
Primary 4G network	Not supported	LTE Cat4 (1, 2, 3, 4, 5, 7, 8, 17, 28, 66) VoLTE
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE
Secondary 2G network	Not supported	Not supported
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	Not supported	Not supported
📷 Camera
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Back camera (main camera)	3.1 megapixels	8 megapixels
Main camera resolution	2048x1536 pixels	3264x2448 pixels
Video recording (primary)	VGA (720x480) 30 fps	Full HD (1920x1080) 30 fps
Flash	Not supported	LED flash on both cameras
Focal aperture	feature not registered	f/2.0 (aperture)
Focal length	feature not registered	27mm (lens)
Sensor size	feature not registered	1/4" inches
Pixel size	feature not registered	1.12µm pixel
Autofocus	Autofocus	Autofocus
Touch focus	feature not registered	Supported
Image stabilization	feature not registered	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	feature not registered	Face detection, Smile detection
BSI sensor	feature not registered	Not supported
HDR	feature not registered	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Front camera (secondary)	0.3 megapixels	5 megapixels
Front camera resolution	640x480 pixels	2560x1920 pixels
Video recording (secondary)	Not supported	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	feature not registered	f/2.2 (aperture)
Focal length	feature not registered	24mm (lens)
Sensor size	feature not registered	1/5" inches
Pixel size	feature not registered	1.12µm pixel
🔉 Sound and multimedia
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Loudspeaker	Supported	Supported
Active noise cancellation	feature not registered	2 microphones or more
Radio	Not supported	FM
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263	MP4, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, eAAC+	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
USB	MicroUSB 2.0	MicroUSB 2.0
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	Not supported
Bluetooth	3.0 + A2DP	4.2 + A2DP
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 b/g/n [wifi4] (2.4GHz)
DLNA	feature not registered	Not supported
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging, GLONASS
NFC	Not supported	Not supported
Infrared port	feature not registered	Not supported
🧭 Sensors
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Sensors	Accelerometer Ambient light sensor Proximity sensor	Accelerometer Ambient light sensor Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Battery type	Li-Ion: lithium-ion (Removable)	Li-Ion: lithium-ion (Non removable) BL-01
Battery capacity	1500 mAh	3000 mAh
Charger, watts	Wired charging	6W (5V/1.2A) Wired charging
Inductive / wireless charging	feature not registered	feature not registered
Talk time autonomy	6.5 hours	17 hours
Standby	456 hours (19 days)	600 hours (25 days)
➕ Other features
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
Call control	Voice recorder	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, Flash player	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Retractable QWERTY keyboard	Not supported
Miscellaneous	• Colors: Matte black, Pearl magenta • 2GB microSD included • Samsung TouchWiz UI • Optical trackpad • HAC M3/T3 • T-Mobile TV • DLNA • WiFi hotspot • Java framework	• Colors: Black, Blue, Platinum • Android Go edition • Google assistant • WiFi hotspot
☢️ Radiation rate
	T-Mobile Sidekick 4G (SGH-T839)	LG K20 (X120HM)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	feature not registered