I bought an acer liquid s100 with 2.1 on it. now I upgraded it to 2.2. I downloaded it from acer and followed the instruction. when I am in the middle of installation, it just finished 25% then shuts down. After that, it showed words in red colors then restarted again and showed a triangle image with an error and a android logo. I dont know what to do next. I followed other forrums but nothing happened. I tried to master reset it but it didn't work. I need your help pls. thanks.