In order to show the HBOOT screen(volume down and power), it helps to turn off fastboot in the power settings, or even just pulling the battery for like 5 seconds, put battery in, then press power and volume down until something happens. There was a recent development for the Wildfire S (I believe CDMA version only though) where you could get the S-off by creating a GOLDCARD for the phone, and running some install file. info over at xda-developers forum. I can confirm the method working with the Wildfire S Virgin Mobile USA (CDMA). Brand new ones from Radioshack stores come with Gingerbread 2.3.4.
But as far as the GSM versions, I don't think there is a way of getting the S-off without the XTC-clip. I can't confirm that, cuz I only have the CDMA version.
Edited by xxcrashxx, 30 November 2011 - 05:42 AM.