Can not call on mobile network

[kamyargerami]

Hi, I run matrix on my VPS using docker image, I think it's all good and I'm connected to federation using the proxy pass.

I can call with my pc with two different clients, also I can call using my phone when I'm connected to wifi.
but I can't call using the mobile network. ( maybe my country limited the network IDK - Iran)

when I'm trying to call my pc shows me a black screen and my android device shows me connecting... message.

I'm using Cloudflare for DNS, I tried to disable the cloud of my DNS records but it does also not work.

Do you think it's about my configuration or it's about element?

homeserver: matrix.mamnon.ir - (mamnon.ir)
element web client: web.mamnon.ir

Xiaomi mi 9t
android 11

app version: 1.1.15 - google play

[DoM1niC]

Do you configure or tried STUN Fallback?

[Ezwen]

Same problem here. I've made mutliple tests, and I have the following results:

• phone 1 (mobile network) — phone 2 (mobile network) : does not work ❌
• phone 1 (wifi) — phone 2 (mobile network) : does not work ❌
• phone 1 (mobile network) — phone 2 (wifi) : does not work ❌
• phone 1 (wifi) — phone 2 (wifi) : works ✅

I am using a self-hosted server. If that helps, here is my STUN/TURN configuration in synapse:

turn_uris:
    - "turn:$HOSTNAME:3478?transport=udp"
    - "turn:$HOSTNAME:3478?transport=tcp"
    - "turns:$HOSTNAME:3478?transport=udp"
    - "turns:$HOSTNAME:3478?transport=tcp"

turn_shared_secret: "$TURN_SECRET"
turn_user_lifetime: 86400000
turn_allow_guests: True

And here is my coturn configuration template:

external-ip=$IP
relay-ip=$IP
listening-ip=$IP
min-port=49152
max-port=65535
verbose
realm=$REALM
cert=/etc/ssl/certs/cert.pem
pkey=/etc/ssl/private/privkey.pem
log-file=stdout
use-auth-secret
static-auth-secret=$TURN_SECRET
no-tcp-relay
denied-peer-ip=10.0.0.0-10.255.255.255
denied-peer-ip=192.168.0.0-192.168.255.255
denied-peer-ip=172.16.0.0-172.31.255.255
allowed-peer-ip=10.0.0.1
user-quota=12
total-quota=1200