PinePhone MMS with Matrix

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Screenshot of fractal displaying an MMS conversation

The one known way to get MMS fully working is by relaying all SMS and MMS to a matrix server and using a matrix client to interact with them. This allows fully working group and image messaging.

On Mobian, incoming and outgoing MMS works with images displayed in line. Outgoing messages over the max size are sent as a link. The link will not resolve if matrix is hosted on the PinePhone itself, so resize your images. An easy way might be to take a screenshot of your image viewer and send that image instead.

On Arch it works for SMS, but images don't go through in or out. Unresolvable links are sent out with an older mmsd, nothing but an error in the log with a newer mmsd. This is probably a configuration issue.

This works with either a local-to-the-pinephone matrix server, or a public one on the internet. Free accounts on should work fine for example.

Install packages


Start with a nice and up-to-date Danctnix' Arch ARM PinePhone installation, mine is from April 20 2021. SSH into the PinePhone and then run this to install all the needed packages

sudo pacman -Sy matrix-synapse fractal python-matrix_client python-gobject git meson ninja base-devel python-matrix-nio python-dbus

Start the service

sudo systemctl enable synapse
sudo systemctl start synapse


Set up Matrix Synapse on localhost

Skip this if you will be using a remote homeserver. Make a new config with the server name set to local host.

cd /etc/synapse/
sudo python -m --server-name localhost --config-path homeserver.yaml --generate-config --report-stats=no
sudo vi /usr/lib/systemd/user/matrix-synapse.service
Description=Multimedia Messaging Service Daemon

ExecStart= python3 -m --config-path=/etc/matrix/homeserver.yaml



Start the service

systemctl enable matrix-synapse --user
systemctl start matrix-synapse --user

and add a new user.

cd /etc/synapse/
register_new_matrix_user -c homeserver.yaml http://localhost:8008 # New user name and pw will both be pp
register_new_matrix_user -c homeserver.yaml http://localhost:8008 # New user name and pw will both be bot

Open fractal and log into the homeserver at http://localhost:8008 with username pp and password pp

Install MMSD

Grab the git repository and install it:

cd ~
git clone
cd mmsd
meson _build
meson compile -C _build
meson test -C _build
sudo meson install -C _build

Settings for T-Mobile

This config works for me

mkdir -p ~/.mms/modemmanager/
vi ~/.mms/modemmanager/ModemManagerSettings

[Modem Manager]

Start MMSD ModemManager service

sudo vi /usr/lib/systemd/user/mmsd-mm.service

Description=Multimedia Messaging Service Daemon

ExecStart=/usr/local/bin/mmsd -n -d


sudo chmod 644 /usr/lib/systemd/user/mmsd-mm.service
systemctl enable mmsd-mm.service --user
systemctl start mmsd-mm --user

Install MMS bridge

Grab it from git and put things in places

cd ~
git clone
cd mmmpuppet
chmod +x
sudo cp mmm*.py /usr/local/bin/
mkdir -p $HOME/.config/mmm/
cp conf.json.sample $HOME/.config/mmm/conf.json

Configure MMS bridge

This will mostly take care of editing the config for you if you are running a local matrix server.

sed -i 's^""^"http://localhost:8008"^' $HOME/.config/mmm/conf.json
sed -i 's^""^"@mm:localhost"^' $HOME/.config/mmm/conf.json
sed -i 's^"Change_me"^"mm"^' $HOME/.config/mmm/conf.json
sed -i 's^""^"@pp:localhost"^' $HOME/.config/mmm/conf.json

You actually have to fill these two out yourself. I put "US" and my +1 and rest of 10 digit number.

vi  $HOME/.config/mmm/conf.json

"cell_number":      "+15554441234",
"cell_country":     "CA",

Now we need to run it once to process the config file and remove secrets


check it out now

cat $HOME/.config/mmm/conf.json

If it doesn't change the file to remove all the linebreaks then it didn't like it. Figure out why by looking at the log file.

cat ~/.config/mmm/mmmpuppet.log

Go fix whatever went wrong. Which should be nothing. You should have seen a message like this as output before it returns you to a prompt:

Login successful. Config updated with token. Run again to start bridge.

Set up MMS bridge service

Make systemd unit

sudo vi /usr/lib/systemd/user/mmmpuppet.service

Description=Starts mmmpuppet interface

ExecStart=/usr/bin/python3 /usr/local/bin/


and start it

sudo chmod 644 /usr/lib/systemd/user/mmmpuppet.service
systemctl enable mmmpuppet.service --user
systemctl start mmmpuppet.service --user

done? see if services are running:

ps aux | grep mm

should show something like this even after reboot

alarm       6374  0.0  0.3 235364  7752 ?        Ssl  22:44   0:00 /usr/local/bin/mmsd -n -d
alarm       6825  9.8  2.7 224976 54188 ?        Ssl  22:52   0:05 /usr/bin/python3 /usr/local/bin/


At this point if you get a message a new room should be created by the bridge bot which you will be invited to. Outgoing works for replies but I can't seem to find the 'set topic' button so new rooms can't be created that the MMS bridge can use. The ones the bridge creates work fine though. Using another matrix client, perhaps a command line one, would work.