What are the differences between the four models of Samsung mobile phone Galaxy S4?

Model	GT-I9508	GT-I9500	SCH-I959	GT-I9502	Notes
Weight	130 grams	130 grams	132 grams	132 grams
Dimensions	136.6x69.8x7.9	136.6x69.8x7.9	136.6x69.8x7.9	136.6x69.8x7.9
Screen	5 inch, Full HD Super AMOLED (1920x1080), PPI441, 16 million colors, up to 10 touch points
CPU	1.9 GHz quad core	1.6GHz quad-core + 1.2GHz quad-core
Memory	2 GB
Network type	TD-SCDMA/GSM	WCDMA/GSM	CDMA 2000/GSM	WCDMA/GSM	Note: Because the SCH-I959 is customized telecommunications machine, so the machine can only use the telecommunications card to access the Internet, but support G network card to call the phone, send and receive information, send and receive MMS.
Card slot	Single	Single	Double	Double
Carrier customization	Mobile customization	China Unicom custom/public	Telecom customization	China Unicom customization
HDMI/MHL	Supported	Supported	Not supported	Not supported	Note: The GT-I9502 and SCH-I959 support connecting to the HDMI device via the AllShare Cast adapter to output the screen to other devices (AllShare Cast needs to be purchased separately)
OTG	Supported
A-GPS	Supported
SAMSUNG DIVE	Supported
Wireless charging	Supported	Supported	Not supported	Not supported	Note: The wireless charging model is supported. To enable this function, you need to purchase another wireless charging device.
S VOICE	Not supported	Supported			Note: Because the mobile edition does not support the s voice function, all VOICE instruction functions are not supported. For example, voice command calls
S instant translation	Not supported	Supported
Sensor	Gravity, electronic compass, light, distance, gyroscope, air pressure
Memory Card	Supports up to 64 GB micro SD card				Note: The brand of micro SD card is not required. However, due to compatibility issues with electronic products, it is recommended that you purchase it after trying to use it in a physical store.
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