Samsung Galaxy is known as SG also. It is a Korean brand and all of these android or electronics devices are marketed by Samsung Electronics. The operating system used in Samsung Smartphones is powered by Google. But it also has a custom user interface which is known as ONE UI.
Since 2013 Samsung produces many smartphones of the GALAXY Series. Let us see this –
SM-Nnn0 – mainstream Note model (New type of model number)
SM-Tnn0/1/5 – mainstream Tab model (New type of model number)
SM-Pnn0/5 – mainstream Tab with S Pen Stylus model
GT-Snnn2/ SM-Gnnn/DS / SM-Gnnn/DD SM-Gnnn2 Dual-SIM “Duos” model
GT-Snnn5/GT-Nnnn5/GT-Pnnn5/GT-Innn5/SM-NnnnF/SM-Tnn5/SM-GnnnF – 4G/LTE model