The following are the technical details of each specific updates in each countries or by region, and the carrier provider itself. This details can be viewed in the device, from Home screen, tap Apps > Settings > About device.
Galaxy S6 SM-G920I Update in Australia
Update build version G920IDVS3EPJ6
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPIA
Kernel version: 3.10.61-8829014
Build number: MMB29K.G920IDVS3EPJ6
Country/Carrier: Australia (SIM Free version)
Update build version G920IDVS3EPJ8
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPJ8
Kernel version: 3.10.61-9101769
Build number: MMB29K.G920IDVS3EPJ8
Country/Carrier: Australia (Vodafone)
Galaxy S6 SM-G920I Update in India, Nepal, Bangladesh, and Sri Lanka
Update build version G920IDVU3EPJH
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPK2
Kernel version: 3.10.61-9592162
Build number: MMB29K.G920IDVU3EPJH
Countries: India, Nepal, Bangladesh, Sri Lanka
Update build version G920IDVS3EPJ7
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPH4
Kernel version: 3.10.61-8981187
Build number: MMB29K.G920IDVS3EPJ7
Countries: India, Nepal, Bangladesh, Sri Lanka
Galaxy S6 SM-G920I Update in Singapore
Update build version G920IDVU3EPJE
Android version: 6.0.1 MarshmallowAndroid security patch level: October 1, 2016
Baseband version: G920IDVU3EPJE
Kernel version: 3.10.61-8436188
Build number: MMB29K.G920IDVU3EPJE
Country/Carrier: Singapore (SIM-Free, Singtel, M1, Starhub)
Galaxy S6 SM-G920I Update in Middle East
Update build version G920IDVS3EPJG
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPI9
Kernel version: 3.10.61-8324534
Build number: MMB29K.G920IDVS3EPJG
Country: KSA
Galaxy S6 SM-G920I Update in Latin America
Update build version G920IDVS3EPJE
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPH3
Kernel version: 3.10.61-8492995
Build number: MMB29K.G920IDVS3EPJE
Country/Carrier: Argentina, Uruguay, Panama, Columbia, Bolivia, Chile, Trinidad and Tobago, Brazil, and more
Update build version G920IDVS3EPJD
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVU3EPI4
Kernel version: 3.10.61-8492995
Build number: MMB29K.G920IDVS3EPJD
Country/Carrier: Peru, Colombia (Claro, Movistar)
Update build version G920IDVS3EPJC
Android version: 6.0.1 MarshmallowAndroid security patch level: October 1, 2016
Baseband version: G920IDVU3EPI7
Kernel version: 3.10.61-8455042
Build number: MMB29K.G920IDVS3EPJC
Country/Carrier: Nicaragua, Ecuador (Claro, Comcel)
Update build version G920IDVS3EPJA
Android version: 6.0.1 MarshmallowAndroid security patch level: October 1, 2016
Baseband version: G920IDVU3EPIF
Kernel version: 3.10.61-9249427
Build number: MMB29K.G920IDVS3EPJ4
Country/Carrier: Brazil, Peru (Claro, Vivo)
Update build version G920IDVS3EPJ4
Android version: 6.0.1 MarshmallowAndroid security patch level: October 1, 2016
Baseband version: G920IDVU3EPI7
Kernel Version: 3.10.61-8332966
Build number: MMB29K.G920IDVS3EPJ4
Country/Carrier: Colombia, Paraguay, Panama (Claro, Comcel)
Update build version G920IDVS3EPJ3
Android version: 6.0.1 Marshmallow
Android security patch level: October 1, 2016
Baseband version: G920IDVS3EPI5
Kernel Version: 3.10.61-8013872
Build number: MMB29K.G920IDVS3EPJ3
Country/Carrier: Mexico, Peru, Chile (Movistar)
These updates were landed either on both unlocked and carrier branded Galaxy S6 SM-G920I in various countries in the Latin America region. Though there many different build version but it has one thing in common, that's the said October Android Security patches.
That's all for now folks! The next updates will posses the November Android Security Patches. Who knows it might come in Android Nougat package. So until then, just make sure to keep your device updated to the latest Android OS updates.