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T-Mobile Sidekick 4G (SGH-T839) vs Xiaomi Black Shark 4S (128GB/12GB)

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

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Compare Xiaomi Black Shark 4S X T-Mobile Sidekick 4G (SGH-T839) 03Points
3.5"
TFT

480x800

3.1
MP

0.3mp

512MB
RAM

Single-core

1500
mAh

(Removable)

vs
27Points Xiaomi Black Shark 4S (128GB/12GB) Compare T-Mobile Sidekick 4G X
6.67"
AMOLED

1080x2400

48
MP

20mp

12GB
RAM

Octa-core

4500
mAh

(Non removable)

What's the better phone? Xiaomi Black Shark 4S (128GB/12GB)

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!

Sidekick 4G (SGH-T839)} 3 Advantages T-Mobile Sidekick 4G (SGH-T839) vs Black Shark 4S (128GB/12GB)} 27 Advantages Xiaomi Black Shark 4S (128GB/12GB)
+Until 32GB microSD, microSDHCAdvantage
More external storage for files using memory cards
vsNot supported
+162 grams (5.67 ounces)30%
Lighter
vs210 grams (7.35 ounces)
+Li-Ion: lithium-ion (Removable)Advantage
Removable battery can be replaced easily
vsLiPo: li-ion polymer (Non removable)
1GHz 32bit Single-corevs+3.2GHz 64bit Octa-core (7nm)5 times
More powerful processor, you can open your applications faster
512MBvs+12GB LPDDR523 times
More RAM memory. Typically more responsive and better for multitasking.
1GB (350MB available)vs+128GB (103GB available)300 times
More internal storage for applications and files
15 millimeters (0.59 inches)vs+9.9 millimeters (0.39 inches)52%
Thinner
TFT LCDvs+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
480x800 pixelsvs+1080x2400 pixels6 times
Higher resolution screen
267 PPIvs+395 PPI48%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
3.5"vs+6.67"91%
Larger screen
(back) 3.1MPvs+(triple camera) 48MP + 8MP + 5MP18 times
Higher resolution main camera
Not supportedvs+LED flashAdvantage
The LED flash helps in dark places or in low light
(front) 0.3MPvs+(front) 20MP64 times
Higher resolution secondary camera to take pictures and selfies
VGA (720x480)vs+4K UHD (3840x2160)23 times
More image quality for recording videos with the primary camera
Android 2.2.1 Froyovs+Android 12Advantage
Android 12 is newer and safer
3G+ HSPA+vs+5G SA/NSAAdvantage
The 5G SA/NSA network is newer and faster
(3G+ HSPA+) 21 Mbpsvs+(5G SA/NSA) 2000 Mbps94 times
Faster for surfing the internet and download files
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Not supportedvs+CompassAdvantage
Sensors help you use the device
Not supportedvs+Face unlock 2DAdvantage
Sensors help you use the device
Not supportedvs+Fingerprint sensor (side-mounted)Advantage
Sensors help you use the device
Not supportedvs+GyroscopeAdvantage
Sensors help you use the device
1500 mAhvs+4500 mAh2 times
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)Advantage
You can have more mobile carriers/operators on the same device.
802.11 b/g/n [wifi4]vs+802.11 a/b/g/n/ac/ax [wifi6]Advantage
WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
3.0 + A2DPvs+5.2 + A2DP/LEAdvantage
Bluetooth 5.2 + A2DP/LE is newer and faster
Not supportedvs+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
MicroUSB 2.0vs+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
HTML, XHTML, Flash playervs+HTML, XHTML, HTML5Advantage
Better sites viewing on the internet

14 Common items in both devices
16 million
Only digital zoom
Autofocus / PDAF: phase detection autofocus
Capacitive
Multitouch
Accelerometer
Ambient light sensor
+7 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 Clear highlight

📱 Model features

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Change model 
ModelSidekick 4G (SGH-T839)Black Shark 4S (128GB/12GB)
Other model namesT-Mobile Sidekick 4G T839, Samsung SGH-T839 Sidekick 4G黑鲨4S, Black Shark 4S (128GB+12GB RAM)
Country or region availableUSA
USA
(Global, International)
(Global, International)
BrandT-MobileXiaomi
Release date4/20/201110/16/2021, Announced: 10/13/2021
Depth15 millimeters (0.59 inches)9.9 millimeters (0.39 inches)
Size (width x height)61 x 127 millimeters (2.4 x 5 in)76.21 x 163.69 millimeters (3 x 6.44 in)
Weight162 grams (5.67 ounces)210 grams (7.35 ounces)
Build, materialsfeature not registeredAluminum body, glass front, plastic back
Protection against water and othersNot supportedNot supported

📲 Display

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Display typeTFT LCDSuper AMOLED
Screen size3.5" inches6.67" inches
Screen-to-body ratio~45% (screen-to-body ratio)~86.1% (screen-to-body ratio)
Display resolution480x800 pixels1080x2400 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch 10-points
Pixel density (dot pitch)267 PPI395 PPI
Colors16 million16 million
Scratch-resistant glassNot supportedNot supported
Refresh ratefeature not registered144Hz
Display featuresfeature not registered1300nits[peak]
HDR10+
Always-On Display
Touch Sampling Rate: 720Hz

🤖 Operating System

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
System versionAndroid 2.2.1 FroyoAndroid 11
Firmware updatefeature not registeredAndroid 12
User Interfacefeature not registeredJoy UI 12 / 13

⚙️ Processor

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Chipset32bit: Samsung Exynos 364bit: Qualcomm Snapdragon 870 (SM8250-AC) (7nm)
CPUSingle-core, 1 processor:
1x 1GHz ARM Cortex-A8 (Single-core)
Octa-core, 3 processors:
1x 3.2GHz Kryo 585 (Single-core)
3x 2.42GHz Kryo 585 (Triple-core)
4x 1.8GHz Kryo 585 (Quad-core)
GPU graphical controllerPowerVR SGX540Qualcomm Adreno 650 (670MHz)
Performance (benchmark)feature not registeredAnTuTu: 710538 (v9)
Geekbench: 3451 (v5.1)

💽 Memory and storage

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
RAM memory512MB12GB LPDDR5
Internal storage1GB (350MB available)128GB (103GB available)
UFS 3.1
External storageUntil 32GB microSD, microSDHC
(dedicated slot)
Not supported

📶 Mobile networks

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
SIM card1 slot (Single-SIM)
Standard mini-SIM (2FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload21/5.76 Mbps2000/1024 Mbps
Network technology2G, 3G2G, 3G, 4G, 5G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900CDMA 800, GSM 850/900/1800/1900
Primary 3G networkUMTS 1700/2100CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 800/850/900/1700/1900/2100
Primary 4G networkNot supportedLTE Cat18 (1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 26, 28)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
Primary 5G networkNot supportedSA/NSA (1, 3, 8, 28, 41, 77, 78)
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedUMTS 800/850/900/1700/1900/2100
Secondary 4G networkNot supportedLTE Cat18 (1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 26, 28)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
Secondary data networkNot supportedGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA

📷 Camera

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Back camera (main camera)3.1 megapixels(triple camera)
48 megapixels
8MP ultrawide f/2.2120°1/4"1.12µm
5MP macro f/2.4AF
Main camera resolution2048x1536 pixels8000x6000 pixels
Video recording (primary)VGA (720x480) 30 fps4K UHD (3840x2160) 60 fps
FlashNot supportedLED flash
Focal aperturefeature not registeredf/1.8 (aperture)
Focal lengthfeature not registered26mm (lens)
Sensor sizefeature not registered1/2" inches
Pixel sizefeature not registered0.8µm pixel
AutofocusAutofocusPDAF: phase detection autofocus
Touch focusfeature not registeredSupported
Image stabilizationfeature not registeredEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionfeature not registeredFace detection, Smile detection
BSI sensorfeature not registeredSupported
HDRfeature not registeredHDR photo on both cameras
Camera extrasfeature not registered4K@30/60fps
1080p@30/60fps
1080p@240/960fps (slow motion)

📸 Front camera

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Front camera (secondary)0.3 megapixels20 megapixels
Front camera resolution640x480 pixels5184x3840 pixels
Video recording (secondary)Not supportedFull HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturefeature not registeredf/2.0 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registeredfeature not registered
Pixel sizefeature not registered0.8µm pixel

🔉 Sound and multimedia

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
LoudspeakerSupportedStereo sound with dual speakers
24-bit/192kHz
Active noise cancellationfeature not registered2 microphones or more
RadioNot supportedNot supported
TVNot supportedNot supported
Video formatsMP4, H.264, H.263MP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, eAAC+MP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
USBMicroUSB 2.0USB 2.0 Type-C, USB OTG On-The-Go
Audio output3.5mm jack3.5mm jack
TV outputNot supportedUSB Type-C (reversible)
Bluetooth3.0 + A2DP5.2 + A2DP/LE
WiFi802.11 b/g/n [wifi4] (2.4GHz)802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
DLNAfeature not registeredNot supported
GPSA-GPS, GeoTaggingA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS
NFCNot supportedSupported
Infrared portfeature not registeredNot supported

🧭 Sensors

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
SensorsAccelerometer
Ambient light sensor
Proximity sensor
Accelerometer
Ambient light sensor
Barometer
Compass
Face unlock 2D
Fingerprint sensor (side-mounted)
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Battery typeLi-Ion: lithium-ion (Removable)LiPo: li-ion polymer (Non removable)
Battery capacity1500 mAh4500 mAh
Charger, wattsWired charging120W Wired fast charging
Reverse charging by cable
Quick Charge 4
USB Power Delivery 3.0
Inductive / wireless chargingfeature not registeredNot supported
Talk time autonomy6.5 hoursfeature not registered
Standby456 hours (19 days)feature not registered

➕ Other features

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
Call controlVoice recorderVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, Flash playerHTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardRetractable QWERTY keyboardNot 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, White, Gundam
• Liquid Cooling System
• Physical pop-up gaming triggers

☢️ Radiation rate

T-Mobile Sidekick 4G (SGH-T839)Xiaomi Black Shark 4S (128GB/12GB)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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