Helping my friend with a Nexus S flash her device to ICS. After some probing, I think her device is a I9020T, from the baseband I9020XXKF1 and build GRK39F. Please correct me if I'm wrong.
So I've instructed her to download the 4.0.3 IML74K update from here to the root folder of her sdcard
I've had experience flashing zip files on HTC phones using CWM, but not on a stock unrooted Google device. Is the procedure the same? By that I mean booting to recovery, selecting the zip file to apply, apply it, then reboot.
Does she need to factory reset/wipe dalvik/wipe cache/etc?