Official ICS has been released for nearly a month officially to Nexus S, however I still haven’t receive any OTA notification, most likely it rolling out in United state first. Since I owned a T-mobile version Nexus S, i got a chance to install the official update from Google. It is easy  to upgrade from Gingerbread to ICS officially. Let’s follow and upgrade to ICS 4 now! Hurray..

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