T-Mobile Sidekick 4G (SGH-T839) vs Blu Vivo X

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

3/8/2018 11:53 PM, updated: 6/6/2025 11:36 AM

Compare Blu Vivo X 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)

25Points Blu Vivo X Compare T-Mobile Sidekick 4G X

Specifications Compare Models Pictures

6"
IPS

720x1440

13
MP

20mp

4GB
RAM

Octa-core

4010
mAh

(Non removable)

What's the better phone? Blu Vivo X

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	25 Advantages Blu Vivo X
+162 grams (5.67 ounces)16% Lighter	vs	188 grams (6.58 ounces)
+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily	vs	LiPo: li-ion polymer (Non removable)
1GHz 32bit Single-core	vs	+2.6GHz 64bit Octa-core (16nm)4 times More powerful processor, you can open your applications faster
512MB	vs	+4GB LPDDR4X7 times More RAM memory. Typically more responsive and better for multitasking.
1GB (350MB available)	vs	+64GB (50GB available)145 times More internal storage for applications and files
Until 32GB microSD, microSDHC	vs	+Until 64GB microSD, microSDXC100% 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	+TFT IPS LCDAdvantage TFT IPS LCD display is brighter and more vivid
480x800 pixels	vs	+720x1440 pixels170% Higher resolution screen
267 PPI	vs	+268 PPI1% Crisper display of text, images and videos because it has more pixels per inch (ppi)
3.5"	vs	+6"71% 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	+(dual front camera) 20MP + 8MP90 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 7.0 NougatAdvantage Android 7.0 Nougat is newer and safer
3G+ HSPA+	vs	+4G LTE-AAdvantage The 4G LTE-A network is newer and faster
(3G+ HSPA+) 21 Mbps	vs	+(4G LTE-A) 300 Mbps13 times Faster for surfing the internet and download files
Not supported	vs	+CompassAdvantage Sensors help you use the device
Not supported	vs	+Fingerprint sensor (rear-mounted)Advantage Sensors help you use the device
Not supported	vs	+GyroscopeAdvantage Sensors help you use the device
1500 mAh	vs	+4010 mAh167% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM) (dedicated slot)	vs	+2 slots (Dual-SIM) (hybrid slot/shares the same microSD slot)Advantage You can have more mobile carriers/operators on the same device.
Not supported	vs	+FMAdvantage The radio lets you listen to your songs and sports in general
3.0 + A2DP	vs	+4.1 + A2DPAdvantage Bluetooth 4.1 + A2DP is newer and faster
HTML, XHTML, Flash player	vs	+HTML, XHTML, HTML5Advantage Better sites viewing on the internet
Not supported	vs	+Gorilla Glass 3Advantage Protection against scratches on the screen lets you carry your phone with your keys

15 Common items in both devices

16 million

Only digital zoom

Autofocus / PDAF: phase detection 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)	Blu Vivo X
Change model
Model	Sidekick 4G (SGH-T839)	Vivo X
Other model names	T-Mobile Sidekick 4G T839, Samsung SGH-T839 Sidekick 4G	BLU VIVO 10 V0230WW
Country or region available	USA	Canada, Spain, USA
Brand	T-Mobile	Blu
Release date	4/20/2011	2/1/2018
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)	76.8 x 160 millimeters (3.02 x 6.3 in)
Weight	162 grams (5.67 ounces)	188 grams (6.58 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)	Blu Vivo X
Display type	TFT LCD	TFT IPS LCD
Screen size	3.5" inches	6" inches
Screen-to-body ratio	~45% (screen-to-body ratio)	~75.6% (screen-to-body ratio)
Display resolution	480x800 pixels	720x1440 pixels (18:9)
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	267 PPI	268 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Gorilla Glass 3
Refresh rate	feature not registered	60Hz
Display features	feature not registered	520nits[peak] 2.5D glass
🤖 Operating System
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
System version	Android 2.2.1 Froyo	Android 7.0 Nougat
Firmware update	feature not registered	feature not registered
User Interface	feature not registered	feature not registered
⚙️ Processor
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Chipset	32bit: Samsung Exynos 3	64bit: MediaTek Helio P25 (MT6757T) (16nm)
CPU	Single-core, 1 processor: 1x 1GHz ARM Cortex-A8 (Single-core)	Octa-core, 2 processors: 4x 2.6GHz ARM Cortex-A53 (Quad-core) 4x 1.6GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	PowerVR SGX540	ARM Mali-T880 MP2 (1GHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
RAM memory	512MB	4GB LPDDR4X
Internal storage	1GB (350MB available)	64GB (50GB available) eMMC 5.1
External storage	Until 32GB microSD, microSDHC (dedicated slot)	Until 64GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot)
📶 Mobile networks
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot)
SIM card	1 slot (Single-SIM) Standard mini-SIM (2FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	21/5.76 Mbps	300/50 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 Cat6 (1, 2, 3, 4, 5, 7, 8, 12, 17, 28)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A
Secondary 2G network	Not supported	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	Not supported	GPRS, EDGE
📷 Camera
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Back camera (main camera)	3.1 megapixels	(dual camera) 13 megapixels 5MP 1/5"1.12µm
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/2.0 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/3" inches
Pixel size	feature not registered	1.12µm pixel
Autofocus	Autofocus	PDAF: phase detection 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	Sony IMX376 sensor
📸 Front camera
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Front camera (secondary)	0.3 megapixels	(dual front camera) 20 megapixels 8MP 1/4"1.12µm120°
Front camera resolution	640x480 pixels	5472x3648 pixels
Video recording (secondary)	Not supported	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	feature not registered	f/2.0 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/2.78" inches
Pixel size	feature not registered	1µm pixel
🔉 Sound and multimedia
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Loudspeaker	Supported	Mono sound (not stereo)
Active noise cancellation	feature not registered	1 microphone
Radio	Not supported	FM
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263	MP4, H.265, H.264, H.263
Audio formats	MP3, WAV, eAAC+	MP3, WAV, eAAC+, FLAC
🔌 Connectivity
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
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	4.1 + A2DP
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 a/b/g/n [wifi4] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	feature not registered	Not supported
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging
NFC	Not supported	Not supported
Infrared port	feature not registered	Not supported
🧭 Sensors
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Sensors	Accelerometer Ambient light sensor Proximity sensor	Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Battery type	Li-Ion: lithium-ion (Removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	1500 mAh	4010 mAh
Charger, watts	Wired charging	Wired charging
Inductive / wireless charging	feature not registered	Not supported
Talk time autonomy	6.5 hours	22 hours
Standby	456 hours (19 days)	700 hours (29.2 days)
➕ Other features
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
Call control	Voice recorder	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
☢️ Radiation rate
	T-Mobile Sidekick 4G (SGH-T839)	Blu Vivo X
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