Revert Nexus S to gingerbread from ICS

[Xaxxus]

So i recently did a manual install of ICS onto my wind mobile nexus S.

ICS has been absolutely terrible on the phone, everything lags (2 seconds or more for a response after tapping on any icon/button etc...)

the already short battery life has been cut in half (2.5 hours to go from 100 - 50% with minimal useage)

So i want to revert to gingerbread. Is it possible to do without rooting my phone? as i plan on selling it, and i want it to be as "Stock" as possible.

 

[srkmagnus]

I don't think you can revert without rooting the device. Before reverting back, what problems are you having? Have you tried a factory reset? Backup all data before you clear the device.