T-Mobile Sidekick 4G (SGH-T839) vs Samsung Galaxy J7 Duo (SM-J720F)

Share page: Facebook Twitter WhatsApp Share page:

Side by side comparison between T-Mobile Sidekick 4G vs Samsung Galaxy J7 Duo phones, differences, pros, cons and full specifications. What's the better?

10/28/2018 11:13 PM, updated: 6/13/2022 6:34 PM

Compare Samsung Galaxy J7 Duo 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)

24Points Samsung Galaxy J7 Duo (SM-J720F) Compare T-Mobile Sidekick 4G X

Specifications Compare Models Pictures

5.5"
AMOLED

720x1280

13
MP

8mp

3GB
RAM

Octa-core

3000
mAh

(Removable)

What's the better phone? Samsung Galaxy J7 Duo (SM-J720F)

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	24 Advantages Samsung Galaxy J7 Duo (SM-J720F)
+162 grams (5.67 ounces)7% Lighter	vs	174 grams (6.09 ounces)
+Ambient light sensorAdvantage Sensors help you use the device	vs	Not supported
1GHz 32bit Single-core	vs	+2.2GHz 64bit Octa-core (14nm)3 times More powerful processor, you can open your applications faster
512MB	vs	+3GB LPDDR45 times More RAM memory. Typically more responsive and better for multitasking.
1GB (350MB available)	vs	+32GB (21GB available)60 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
15 millimeters (0.59 inches)	vs	+8.2 millimeters (0.32 inches)83% Thinner
TFT LCD	vs	+Super AMOLEDAdvantage Super AMOLED display is brighter and more vivid
480x800 pixels	vs	+720x1280 pixels140% Higher resolution screen
3.5"	vs	+5.5"57% Larger screen
(back) 3.1MP	vs	+(dual camera) 13MP + 5MP5 times 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) 8MP25 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 10Advantage Android 10 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
Not supported	vs	+ANT+Advantage Sensors help you use the device
Not supported	vs	+Face unlock 2DAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (front-mounted)Advantage Sensors help you use the device
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
802.11 b/g/n [wifi4]	vs	+802.11 a/b/g/n/ac [wifi5]Advantage WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster
3.0 + A2DP	vs	+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster
HTML, XHTML, Flash player	vs	+HTML, XHTML, HTML5Advantage Better sites viewing on the internet
Not supported	vs	+Gorilla GlassAdvantage Protection against scratches on the screen lets you carry your phone with your keys

15 Common items in both devices

16 million

267 PPI

Only digital zoom

Autofocus

Capacitive

Multitouch

Accelerometer

+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)	Galaxy J7 Duo (SM-J720F)
Change model		Choose the model
Model	Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Other model names	T-Mobile Sidekick 4G T839, Samsung SGH-T839 Sidekick 4G	Galaxy J7 Duo J720F Single-Sim, Samsung J720
Country or region available	USA	South Africa, United Arab Emirates
Brand	T-Mobile	Samsung
Release date	4/20/2011	4/1/2018
Depth	15 millimeters (0.59 inches)	8.2 millimeters (0.32 inches)
Size (width x height)	61 x 127 millimeters (2.4 x 5 in)	77.2 x 153.5 millimeters (3.04 x 6.04 in)
Weight	162 grams (5.67 ounces)	174 grams (6.09 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	Not supported
📲 Display
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Display type	TFT LCD	Super AMOLED
Screen size	3.5" inches	5.5" inches
Screen-to-body ratio	~45% (screen-to-body ratio)	~70.4% (screen-to-body ratio)
Display resolution	480x800 pixels	720x1280 pixels (16:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	267 PPI	267 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Gorilla Glass
Refresh rate	feature not registered	60Hz
Display features	feature not registered	Not supported
🤖 Operating System
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
System version	Android 2.2.1 Froyo	Android 8.0 Oreo
Firmware update	feature not registered	Android 10
User Interface	feature not registered	One UI 2.0
⚙️ Processor
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Chipset	32bit: Samsung Exynos 3	64bit: Samsung Exynos 7885 (14nm)
CPU	Single-core, 1 processor: 1x 1GHz ARM Cortex-A8 (Single-core)	Octa-core, 2 processors: 2x 2.2GHz ARM Cortex-A73 (Dual-core) 6x 1.6GHz ARM Cortex-A53 (Hexa-core)
GPU graphical controller	PowerVR SGX540	ARM Mali-G71 MP2
Performance (benchmark)	feature not registered	AnTuTu: 98104 (v7)
💽 Memory and storage
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
RAM memory	512MB	3GB LPDDR4
Internal storage	1GB (350MB available)	32GB (21GB 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)	Galaxy J7 Duo (SM-J720F)
Dual-SIM	Not supported	Not supported
SIM card	1 slot (Single-SIM) Standard mini-SIM (2FF)	1 slot (Single-SIM) micro-SIM (3FF)
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 850/900/1900/2100
Primary 4G network	Not supported	LTE Cat4 (1, 3, 5, 7, 8, 20) TD-LTE (38, 40, 41)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, 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)	Galaxy J7 Duo (SM-J720F)
Back camera (main camera)	3.1 megapixels	(dual camera) 13 megapixels 5MP depth f/1.9
Main camera resolution	2048x1536 pixels	4128x3096 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/1.9 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
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 only main camera
Camera extras	feature not registered	feature not registered
📸 Front camera
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Front camera (secondary)	0.3 megapixels	8 megapixels
Front camera resolution	640x480 pixels	3264x2448 pixels
Video recording (secondary)	Not supported	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	feature not registered	f/1.9 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Loudspeaker	Supported	Mono sound (not stereo)
Active noise cancellation	feature not registered	Not supported
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)	Galaxy J7 Duo (SM-J720F)
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	5.0 + A2DP/LE
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	feature not registered	Not supported
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging, GLONASS, BeiDou
NFC	Not supported	Not supported
Infrared port	feature not registered	Not supported
🧭 Sensors
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Sensors	Accelerometer Ambient light sensor Proximity sensor	Accelerometer ANT+ Face unlock 2D Fingerprint sensor (front-mounted) Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
Battery type	Li-Ion: lithium-ion (Removable)	Li-Ion: lithium-ion (Removable)
Battery capacity	1500 mAh	3000 mAh
Charger, watts	Wired charging	Wired charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	6.5 hours	20 hours
Standby	456 hours (19 days)	feature not registered
➕ Other features
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
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, Gold, Rose Gold, White • Samsung Pay
☢️ Radiation rate
	T-Mobile Sidekick 4G (SGH-T839)	Galaxy J7 Duo (SM-J720F)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	0.543W/kg (head), 1.397W/kg (body)