WiFi Calling Guide

If you’re experiencing issues with calls dropping on your cell-phone, please try the following troubleshooting steps. If you get stuck, please phone our office.

 

    1. Please ensure you’re mobile phone has WiFi calling enabled.
      (a) On Android phones it will normally be in settings -> connections -> WiFi Calling
      (b) On iPhones it’s normally in settings- -> mobile -> WiFi calling
    2. Please set your calling preference to WiFi calling instead of 4G/LTE/5G.

      (a) On an Android phone, you should set your calling preference to Wi-Fi preferred.  The reason for this is that if your phone detects any signal from the cell-tower, it may switch to that even if the signal is very weak.  
      It differs by manufacturer but is usually under       settings -> connections -> WiFi Calling -> Calling Preference.  
      On other manufacturers’ phones, it may be under s      ettings -> Network & Internet -> Mobile network (or SIMS) -> WiFi Calling -> Calling Preference.  
      If you have a multiple SIMS/eSIMS on your handset, you may have to do this for each one.

      (b) On an iPhone it’s not possible to set WiFi calling preferences.  Turning off WiFi Assist (settings -> Cellular/Mobile Data -> Wi-Fi Assist) may help as this should stop your phone jumping on and off WiFi.  If this does not work, the only workaround is to turn on Airplane Mode and then re-enable WiFi.  This will force all calls over your WiFi network.  Please remember to disable Airplane mode when you are outwith the WiFi network. 

    3. If you’re still having issues with WiFi calling then your first step should be to eliminate WiFi network issues.  
      A good test is to 

      (a) make a Zoom/Teams/Google Meet call from your handset 

      (b) visit https://speedtest.net/ , download the OOkla speedtest app and run a test.  

      Compared to a video call, WiFi calling uses minimal bandwidth (less than 0.2Mbps) so speed is rarely an issue but if your speedtest is below 10Mbps you may be too far from the WiFi router you’re connected to for a reliable connection.  
      Latency (a.k.a.) ping should be under 100ms although 150ms is still acceptable.  
      Jitter should be below 30ms but 50ms is still acceptable.    
      Please ensure the IPv4 address shown in the speedtest is from WIZwireless (the first two octets will be 202.174 ) as WiFi calling won’t work over a VPN.

      If ether of the above tests show poor results then please visit our troubleshooting guide.

    4. Phone our office on 06 370 9210 or email zn.ten.zibziw@troppus. If calling outside of working hours please leave a voicemail and one of our on-call technicians will review it as soon as they can.