Originally Posted by psa47
wich box do you use to repair this problem?
I "killed my phone for more than 4 hours a couple of nights ago. Long story short I was trying to do the same thing, "downgrade fro kitkat for personal reasons. The phone wouldn't boot up, and couldn't get it to go to download mode. Afternseveral tries it finally got into doenload mode and I was able to reflash with original/official kitkat, and it works just fine, the onky thing is that I keep seeing that imei certi : na status on the service mode screen and can't navigate to other screens within service mode. Im trying to sim unlock it using that method. I'm not sure that I did anything special, just try to reflash again with official kitkat and hopefully it will stick...