Help can`t connect my k800i

[Lapte]

I tried setool2lt , XS++ , FAR Manager and update serice. Nothin happens when i hold C button and plug in the cable. But on XS++ with 2+5 i get "Baseband ID: 9900 Protocol Version: 3.1". On setool2lt i get :"phone pre-boot failed,possible RECOVERY needed".
The main thing is that noting workes with C button , why ??????
Can anybody help me ???
Thanks in advance

[Lapte]

anybody ???????

[johnkor]

if ur phone is dead it cant be detectable using XS++ unless u use Setoollite

[jab33]

thanksssssssss alot

[makam204]

Install USB Driver or SE PC suite to Connet Device

[demon2blad]

reflash with your main firmware and fs pack like you did wen you unbranded your phone on x++ or use your gdfs back up then start again

[hyperion17]

GDFS is damaged or corrupted when Setool shows the message "Can't read SCRC unit". GDFS backup should be restored only when is damaged. He should reflash ONLY MAIN .

[ranger69]

try install driver with SE PC suite