Samsung Galaxy S4 SGH-M919 T-mobile works under GSM data networks technology and also 4G LTE. Under the 3G networks (uses 850/AWS/1900/2100Mhz) the phone can stand by for about 350 hours and 8 hours on internet usage time. It’s almost has the same duration durability for 4G LTE Networks (bands 1/2/4/5/7/17). These can be happened because the Li-ion battery used on the device has 2600mAh capacity.
SPECIFICATIONS:
Bands and frequency
HSPA+ Bands: I (UMTS 2100), II (1900), IV (1700/2100/AWS), V (850)
LTE Bands: Band 1 (2100), 2 (1900), 4 (1700/2100), 5(850), 7 (2600) & 17
GSM Bands: 850, 900, 1800, 1900
Connectivity
LTE
HSPA+
Bluetooth®
Wi-Fi 802.11 x a/b/g/n/e
NFC (Near Field Communication)
Processor and operating system
Qualcomm 1.9 GHz Quad Core Processor
Android 4.2.2 Jelly Bean OS
Memory
2 GB RAM
16 GB ROM
microSD card slot (supports up to 64 GB card)
Display
5” Full HD Screen
1,920 x 1,080 resolution
441 ppi
Camera, photos, and videos
13 MP BSI Camera Sensor with LED flash
2 MP front-facing camera
Audio
HD Voice
Wi-Fi calling capable
3.5 mm stereo audio jack
Codec: MP3, OGG, WMA, AAC, ACC+, eAAC+, AMR(NB,WB), MIDI, WAV, AC-3, Flac
Hearing Aid Compatibility (HAC) rating : M3
Battery life and power
2600 mAh battery
Talk Time: Up to 17 hours
3G Standby Time: Up to 350 hours
4G Standby Time: Up to 300 hours
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