hi,I updated my Huawei UMG1831 data card with k4505 firmware two days before.After that I was able to use voice call but when I checked for IMEI in dc-unlock client it replied that the datacard not found. Then I again updated the datacard with umg1831 firmware version 11.831.05.01.420.B427.But from that point my modem is not detecting 3g signals. It only shows EDGE signal. Also my IMEI is lost. I have purchased the data card to use with 3g sim and hspa newtwork but now it's not detecting hsdpa signal. So if any one knows how to solve this problem plz reply.Thanks