You may try different steps to get you WIFI password.
Get a device which can connect to you pocket wifi.
Access the web user interface (normally it's 192.168.1.1 or 192.168.8.1 for huawei devices)
Log in using the username and password. (check the manual for details)
Settings > WLAN Basic Settings check/the password.
Another option is resetting the Device.
Press and hold the reset button for 15-20 seconds.
Then reconnect and reconfigure the device using the default Password.