My new OnePlus 8-5G phone (TMobile in US) cannot consistently send/receive wifi calls. Once answered, there is no sound on the OnePlus 8-5G phone while the other end can hear OK. I’ve tried updating the phone’s software (it is up to date) and I have updated the firmware on my router (which works with wifi calling with other phones: iPhone 11, iphone8, Droid Turbo 2, Motorlla Razr MAXX). I also tried disabling any battery saving features on the device and even did a factory rest of it (with no apps installed). I have also tried rebooting the phone once I have connected to the wifi router. Phone has same issues on any wifi router I have connected to. browsing is fine, only wifi calling is a problem.

Probably not what you want to hear, but the 4 of these phones on my account all do the same thing. When I called in a service request about it to T-Mobile, they’re all like “have you tried factory resetting your phone?”“So, I have to do that every day?”“Um.. “

It is nice to know that this is not a unique problem and disturbing that their is no solution. Since it doesn’t seem limited to the One Plus 8, this appears to be a T-Mobile problem. What are you doing about it?

Same issue here my s21 is fine but with my wife's oneplus nord n10 she gets no sound when connected to a call using wifi calling.

I just tried something that seemed to fix this on my Pixel 5:I set Wi-Fi Calling to “Call over mobile network”, turned off “Carrier video calling”, turned on “Airplane Mode”, connected to the Wi-Fi and tried calling my voicemail. It worked, so I turned off “Airplane Mode” and it still works! The winning combo seems to be “Call over mobile network” and turning off “Carrier video calling”. Hope this helps someone else!

I’m having the exact same issue on my oneplus 8t 5g. Everyday I need to reset my phone to get Wi-Fi-calling to work. It will randomly stop working even in the middle of calls. Users are able to hear me, but I get no audio from my speaker, speakerphone, or connected Bluetooth accessories. I’ve got a 1gig home internet circuit, Wi-Fi 6 5ghz network, and I’m literally right next to the access point. My device is fully patched.T-Mobile, what is going on with your Wi-Fi calling network?!?! I switched from my galaxy s10 because of wifi calling issues on that device Galaxy Note 10 Wi-Fi Calling Preferences Updated Automatically | T-Mobile Community (t-mobile.com)

OnePlus 8-5G Wifi Calling has no sound

soccerfan311
Newbie Caller
2 years ago
sakaches wrote:

Same, wifi calling not working on Oneplus8t+. Anyone with any update on resolving wifi-calling issue?

There was a previous response that ended up working for me: https://community.t-mobile.com/network-coverage-5/oneplus-8-5g-wifi-calling-has-no-sound-32868?postid=131724#post131724
The key for me was to turn off “Carrier video calling”.
In the Settings app, either search for “Carrier video calling” or navigate “Network & Internet” > “SIMs” > “Carrier video calling”.
I restarted my phone just to be sure, called someone and could hear them on the other end.
This problem has been bugging me for years on my Pixel 5.
Cork
Network Novice
3 years ago
I was having the same problem and got it to work by setting ‘Calling preference’ to ‘Cellular preferred’ (the option is in the same place an ‘Enable Wi-Fi Calling on my OnePlus Nord N20).
My guess is ‘Cellular preferred’ has the phone connect using cellular, then switches to the network. So not much help if you don’t have cell service, but it helps me as my cellular is just weak, but good enough to connect.
TheWebBuddha
Network Novice
3 years ago
My family has been experiencing this as well, across OnePlus and Samsung devices. I just found this link on a Reddit thread and many users have reported it correcting this issue for them. It involves opening firewall ports up at your router. The article is filed under “WiFi calling on a corporate network” so how would we find it, right? Wi-Fi Calling on a corporate network | T-Mobile Support
Summary of the article:
Firewalls
IPv4 Address Block: 208.54.0.0/16:
PORT / PROTOCOL / DESCRIPTION
Port: 500 / UDP   / IPsec - IKE : Authentication [WFC 2.0]
Port: 4500 / UDP / IPsec - NAT traversal : Encrypted voice traffic [WFC 2.0]
Port: 5061 / TCP + UDP / SIP/TLS : Encrypted SIP [WFC 1.0]
IPv4 Address Block: 66.94.0.0/19:
PORT / PROTOCOL / DESCRIPTION
Port: 443 / TCP   / HTTPS : Used for handset authentication [WFC 1.0]
Port: 993 / TCP   / IMAP/SSL : Visual Voicemail [WFC 1.0]
Also whitelist the CRL server for DIGITS OTT and WFC 1.0: crl.t-mobile.com 206.29.177.36
Martsmac
Network Novice
3 years ago
This is just ridiculous at this point. I work below ground and need wifi calling as my place of work has no TMobile coverage downstairs. One plus 8 5G, EVERYBODY is muted on ALL wifi calls until I turn off wifi calling.

This is my first and last phone with t mobile.
badpenguin
Roaming Rookie
3 years ago
I just started having the same problem about 3 days ago. Has there been any progress on this issue?
sakaches
Network Novice
3 years ago
Same, wifi calling not working on Oneplus8t+. Anyone with any update on resolving wifi-calling issue?
Pokey
Network Novice
3 years ago
This has to be a T-Mobile issue. I have a Motorola Razr 2020 and this just began happening to me a few days ago. When I place or receive a call, I cannot hear the other party but they can hear me. I can disconnect from WiFI while in the call and I can immediately hear the other party.

Very frustrating
formercanuck
Spectrum Specialist
4 years ago
Going back through these posts… I had an LG G7 (Android 9?), LG Velvet (Android 10), Samsung A32 (Android 10), LG One Plus 8 (Android 10 → 11), and Samsung S21 (note: A32 was ‘freebie’ for spare line), Velvet and OnePlus 8 were exchanged due to various issues through T-Mobile.
I haven’t had issues with WiFi calling on these, although I can’t say that I’ve used it much on Velvet/OP8 or Samsung. I used it quite a bit on G7. I’ll have a good chance to use it soon, as T-Mobile’s coverage is not quite usable in Cambria, CA, and may have to resort to it if I don’t want to have to walk a mile to make a call.
poogene
Newbie Caller
4 years ago
hey there,
an option that is usually enabled by default on my most home routers is something called
SIP ALG
the location of this feature will vary according to which router you got but you wanna make sure this is disabled.
hopefully this will vastly improve your situation. troubleshooting VoIP issues can be extremely difficult to isolate (hence t-mobile giving eryone the run around) but issues of one way audio, no audio and dropped calls can usually be blamed because SIP ALG is on.
g’luck and happy new year!
formercanuck
Spectrum Specialist
4 years ago
Typical OnePlus. upgrades breaking features. as much as I liked the hardware and ui, OnePlus bugs ended up with me trading for a Samsung s21 after 10 months of broken features that they won't fix.