[General Questions and Answers] jvrey5:
I have tried to make an update.zip (with the original build.prop) file but it say me : E: signature verifacation failed.[/QUOTE]

I think that's also one of the quirks with this phone. I've tried it myself - both by creating ZIPs that I signed using test keys from the SDK and with several other signing tools and even with known working ZIPs for several apps. I've tried even when my phone was working fine. That's actually the reason why I suggested you using ADB.

I'm not sure if your phone responds as like mine, but at the moment, my phone only stays on for about 10 mins on recovery mode before it reboots on it's own. If so, you need to be quick or you'll need to go into recovery several times.

Since the build.prop is in the system folder, check to see if you can still access it. While in recovery, run ADB and pull your system folder. ADB is an old-school program or a line-based one which makes it somewhat more difficult to use. Open a windows explorer on your PC and make sure that you don't have a system folder in the root of your C: drive. Normally, you shouldn't, but if you do, just pull it to a different folder.

ADB PULL /SYSTEM C:/SYSTEM

Now you should have a copy of the phone's system folder on your PC. If not, the error in ADB should be self-explanatory. This is the easy part. Transferring the build.prop may be a bit tricky. I suggest that you put the original build.prop also in the root of C: this way, you lessen typo errors.

ADB PUSH C:/build.prop /system

Adjust accordingly depending on what comes up in ADB. If it was successful, delete the system folder in your PC and pull it again and check if the file was really changed or just merged. If successful, reboot and hopefully it works.

If it still doesn't work, you may need to push an edited build.prop file. You can say that this file acts as a console or a switch box. You are able to turn switches on or off or even add a few switches. Specially when you added switches, that doesn't mean that when you put the original console back that would automatically reset the switches. Sometimes, you may need to recreate the switch you added and manually reset it. Simply put, use the modified file and then manually editing them back to default. I sure hope you know what the defaults should be for the things you added.

You could actually say that I was also scammed because I asked for an ICS phone. I think it was originally being sold at 7.5K which is why I thought it was a good deal when he gave it to me for 5K. Anyway, are you still having driver problems? If not, Android Commander should work. Just make sure to use H_Bler's ADB files 'coz it also uses ADB.

If you don't get any error messages when you type ADB ROOT and ADB REMOUNT, then just run the I_Am_DooMed file.

If you get error messages after running those commands, then google these errors to know more about it.

---------- Post added at 01:15 AM ---------- Previous post was at 12:54 AM ----------

There are only 3 button combinations for the S930:

POWER = turns phone on

Vol- + Pwr = recovery mode

Vol+ + Pwr = fastboot

I hate to be the bearer of bad news, but if none of there work, then your phone is already bricked. If it still turns on though, I suggest that you don't mess with it anymore.