I had the same problem with my x10, i tryed everything even turning it off for a while then back on. I entered in my google account info over twenty times and it still never let me in. I have managed to now unlock my phone without having to send it away, i went on to sonny ericsons website and upgraded the software on my phone. The only thing about doing this is that it wipes off anything saved to it. Just remeber to take out sim card and memory cards.