Make sure the WiFi router is set to 2.4 GHz-only (not dual-band or 5 GHz), WEP/WPA/WPA2 personal security, without any special characters in the SSID (WiFi name) and password, and no more than 16 characters in the password.
Make sure your iHealth MyVitals app is the legacy version (version 3.13.1).
Connect your smartphone/tablet to the 2.4 GHz-only WiFi network.
Press the Set button on the scale’s battery cover and make sure the scale displays “SET.”
In the MyVitals app, tap on the three horizontal bars in the top left corner to open the manu.
Choose “Set Up My Devices.”
If the “Vista” scale is already added, tap on it and select “Reset Wi-Fi,” then follow the on-screen instructions.
If the scale has not been added to the app, choose “Select New Device,” “Scales,” “Vista (HS5S),” and follow the on-screen instructions.