If you tried to make your modem compatible for android roms and want to reset the settings of your modem to work on windows again, you can reverse the setting for your modem with this codes, just enter it on your hyper terminal like you did when you followed the steps to make your modem compatible for android.
Here are the codes:
AT ^ U2DIAG = 0 (device-only modem)
AT ^ U2DIAG = 1 (unit in modem mode + CD-ROM)
AT ^ U2DIAG = 255 (the device in modem mode + CD-ROM + Card Reader)
AT = 256 ^ U2DIAG (device in modem mode + Card Reader)