OK, I know there's stuff out there on this - but tbh I can't understand it.
I have a UK HTC Desire S on T-mobile. I used the official HTC download to upgrade to ICS last year (it was not OTA but on their website). However, when I came to unlock the phone recently (to allow my daughter to use it on another network) I cannot get it to prompt me for the unlock code.
I've performed a "factory reset" but that didn't help, and the best advice I can find online seems to indicate I should restore the original OS. But I've not the faintest idea how to do this.
I'm not sure what other info to give - it is currently running 4.0.4 and Sense 3.6.
IF there's a dummies guide to this somewhere, I'm happy to be pointed - but I can't find it.