2. start TerminalThen start the Wi-Fi Hotspot app. Solved!
3. type the following
echo 1 > /sys/devices/platform/wl1271/allow_adhoc
it will prompt for a password after the first command, the password is "rootme"
The Wi-Fi Hotspot app on my Nokia N9 doesn't work on AT&T. To fix, follow these instructions from the maemo.org forum: