Samsung Galaxy S3 Connectivity Comparison of U.S (AT&T SGH-I747, T-Mobile SGH-T999, Verizon SGH-I535) and International (GT-I9300)

I was just confused, if somehow if the the U.S variants of Samsung Galaxy S3 like the AT&T SGH-I747, T-Mobile SGH-T999 and Verizon SGH-I535 can also be used in other countries. So I did a quick search for how the connectivity capabilities differs from each other. In U.S mostly mobile operators carrier were run in 4G LTE network which means it is has higher frequency bandwidths from other countries. These almost the same in Canada, some countries in Europe and Asia but others only have GSM/CDMA mobile network connections. The below table is a comparison of the Galaxy S3 variants from U.S and international version which is the Samsung Galaxy S III GT-I9300. So, lets take a closer look for a while.

U.S and International Samsung Galaxy S III Network Connectivity Comparison

International Samsung Galaxy S III GT-I9300	AT&T Samsung Galaxy S III SGH-I747	T-Mobile Samsung Galaxy S III SGH-T999	Verizon Samsung Galaxy S III SGH-I535
2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 900 / 1900 / 2100 4G Network LTE (regional)	2G Network  GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 1900 / 2100 4G Network LTE 700 MHz Class 17 / 2100	2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 1700 / 1900 / 2100	2G Network CDMA 800 / 1900 3G Network CDMA2000 1xEV-DO 4G Network LTE 700 MHz Class 13

The Samsung Galaxy S3 GT-I9300 International version was also built with LTE 4G network connection capability but only for those regions with higher frequency mobile networks. Whilst the US carrier variants seemingly built with 4G LTE capabilities that can also work both with GSM 2G and CDMA 3G frequencies, which means if those U.S variants Galaxy S3 devices can be unlocked or debranded,  it can also be used on other countries with GSM network only or without 4G network providers.

The most part these different Samsung Galaxy S3 variants only both the same with each features, like the main display technology which is the Super AMOLED capacitive touchscreen, 16M colors with a size of 720 x 1280 pixels, 4.8 inches (~306 ppi pixel density) with Corning Gorilla Glass protection. The camera which is 8.0 Megapixel are seemingly high quality photo resolution.

The differences took to my attention is the CPU processor used which are different from each other. Now note that the CPU handles the speed of the any mobile phone while browsing, playing media and etc.

International Samsung Galaxy S3 I9300	US AT&T, Verizon, Sprint, T-Mobile Samsung Galaxy S3
OS Android OS, v4.0.4 (Ice Cream Sandwich) Chipset Exynos 4212 Quad CPU Quad-core 1.4 GHz Cortex-A9 GPU Mali-400MP	OS Android OS, v4.0.4 (Ice Cream Sandwich) Chipset Qualcomm MSM8960 Snapdragon CPU Dual-core 1.5 GHz GPU Adreno 225

Although, this device is powered with Android Operating system, there is still a big factor on hardware speed capabilities. The Samsung Galaxy S III GT-I9300 international version is packed with  "Quad-core 1.4 GHz Cortex-A9, Exynos 4212 Quad chipset" while the U.S variants build with Dual-core 1.5 GHz, Qualcomm MSM8960 chips.  So which one is faster? Well, lets just compare the two, I will make another research about the speed differences between these two CPU's or processors.

source: Samsung US, Gsmarena