I have a Sony Xperia C2305. Today, when I restart the phone, it gave the "encryption unsuccessful" error without any reason, and asking to reset the phone. After struggling with this odd error, I eventually decided to repair the phone with Sony Xperia pc-comapnion. So, I downloaded the software and followed the instruction to repair the phone. At the middle of the process, it gave this error "UEUpdateFailed UE_2005"!! I tried a few times more after but I got the same error. As a result, I did hard reset through "wipe data/reset factory" option in Android recovery menu. Now, the situation is worse. When the phone starts, it shows Sony logo, then the logo disappears, then reappears. I'm not sure that this appearance and disappearance is because of the phone is restarting or the logo actually blinking. Any idea to get out of this trouble.