WiFi Calling sound drops every 4-8 secounds; only this device. Suggestions?


    I have two devices that are WiFi-Calling-capable: my HTC One M8, and my LG Stylo 2 Plus.


    The HTC One M8 works flawlessly. The LG Stylo 2 Plus has an issue; every 4-8 seconds, the audio drops to static.


    I've ensured that both devices are using the same WiFi connection (5 GHz band, so it's not 2.4 GHz interference). I'm using a genuine T-Moblie WiFi Cellspot as my router. The LG Stylo 2 Plus works flawlessly using the cell network (when I have reception). The issue is ONLY when WiFi calling.


    My cell reception at home is "good" on all the maps - 3-4 bars at best. Sometimes as bad as 1-2. So WiFi calling is important.


    Thoughts? Suggestions?

      All replies

      • tmo_marissa

        Hey alx29!  It definitely sounds like the Stylo's got an issue.   Did it have this problem with Wi-Fi calls right out of the box, or did this only start recently?  Have you been able to test this device on another Wi-Fi network to see if it happens outside of your home?  It's a shame to think it could be having trouble with such a basic function when it sounds like it's working great over the network.  I'd imagine that the speed of your ISP connection isn't likely to be the culprit though, since your HTC is working so well.  It sounds like Wi-Fi calling is an imperative so that you can have a stable in-home connection, let us know a little more about when this started and what troubleshooting you've been able to do (if any)!


        - Marissa

          • alx29

            Thanks for the reply tmo_marissa . First, as far as home internet speed, on a bad day I'm getting 50Mbit down and 12Mbit up, so that shouldn't be a concern.


            I tested on a couple of other networks, with disparate results: on one network I had the audio drop every 15-20 seconds, and on another only every few minutes. However, I'm noticing that the issue is worse the longer the phone is on... I had almost no issues after rebooting it. So at least now I'm fairly sure that rebooting is a solid mitigation strategy. I'm beginning to suspect an application issue.


            I'm currently researching one specific app & service - I found a running app & service called "MBN Test" and "MbnSystemService". The process name of MBN Test is "com.qualcomm.qti.modemtestmode". I've only been able to try this once, but when I stopped the service, the performance of wifi calling improved immediately. Since I've restarted several times, the issue appears to be at bay, at least for now. I'm going to test stopping that service the next time the problem appears, too, to see if it's repeatable, or if it was coincidental.