You can use the following process to manually enable Wi-Fi connection on a J100 phone with the wireless module installed.
Procedure
Access the administration menu:
If shown on the display, press Admin. Otherwise, press More and Admin or press and select Administration.
Enter the administration password and press Enter. These phones do not support pressing # to enter the password.
If you want the phone to use Wi-Fi: Wireless connection is supported on phones with the optional Wi-Fi module installed. Select Network interfaces.
Change the Network mode from Ethernet to Wi-Fi.
Press Save. The phone scans for available wireless networks.
Select the required network and click Connect. Press OK.
If hidden Wi-Fi is enabled (see Enabling hidden Wi-Fi SSID support), you can click scroll down and select Add Network to add details for connecting to a network that does not broadcast its SSID.
In the Password field, enter the password for the wireless network and press Wi-Fi. If the phone is able to connect to the network, it is restarted.