Sony Xperia Go is and android phone with a V2.3 Gingerbread OS. Recently Sony Xperia announced that it will get an update to a newer version V4.0 Ice Cream Sandwich. Sony Xperia GoAll Xperia P users will get a notification when the upgrade is ready, but direct availability in the phone may vary across different markets and carriers, according to Sony.
Sony Xperia Advance is another name for Xperia Go, Sony ST27i, or Sony ST27a. This Android phone chipset is a NovaThor U8500 with a Dual-core Cortex-A9 CPU and Mali-400 GPU. It comes in a scratch-resistant glass and water resistant you can submerge this in water and will still work. (just cover the usb port and 3.5 mm jack together with Xperia's SIMcard holder. This android phone is a tough smart phone with three available color White, Black and Yellow. check out
Sony Xperia Go Price and detailed specs here: