@mariogrip
As it is difficult for developers to have access to all phones to check/debug a given issue,
Ratchanan has twice used my VPN to connect to my spare phone (camera patch and bluetooth car debug).
I can offer the same service for others if it is useful.
Xiaomi Redmi Note 9 Pro

@mariogrip
Thank you for the summary table, it gives a pretty good overview.
I would like to point out that some of the issues listed are not present on the phone I use every day, so perhaps indicating which phones do not encounter these issues could help/guide the implementation of fixes:
Xiaomi Redmi Note 9 Pro

Priority 1 bugs
None of them on my daily driven phone.
VPN: connection to my openvpn instance without any problem. (but has been quiet hard to make it functionnal)

Priority 2
Bluetooth: working with some issues (Ratchanan has a quiet clear idea on this)
Imap mail notification: works...
Communication (voLTE): works fine (Orange Belgium)

Priority 3
Keyboard crash: never.

@nparafe
Hello.
Are you installing snap?
I thought that since 24.04, snap had been present on the system.
I use it (on 24.04-2x) with cups, avahi and hplip to print from my phone (Xiaomi Redmi Note 9 Pro).
Admittedly, not all snaps are compatible at the moment.
As this is a project run by volunteers (many thanks to them), I would rather rejoice in this progress than regret that not everything works as it does on Ubuntu.
Everyone is free, according to their skills and abilities, to advance UT to obtain a snap that is fully integrated into our OS or snaps adapted to a phone.
When you want to go far, the key is not to go fast, but to keep going.
Let's remain positive about the gifts this OS brings us, to respect the work and dedication of its developers.

Thank you, Marius, for this initiative.

Every user is different, and so is every device.

Use
I have a Xiaomi Redmi Note 9 Pro, and I wouldn't change its operating system for anything in the world.
It is completely reliable (so why isn't this always the case for some?), lasts several days without recharging, and meets all my needs.

Browser
Personally, I rarely use my phone's browser, as I spend enough time in front of my PC that I don't need it very often.

Installation
The installation process is likely to put many people off (fear of rendering their phone unusable, complexity, limited choice).
Please, offer stable versions before development versions in the installer.

Hardware
Everything works on my phone. (A huge thank you to the porters.)

It would be nice to have the top bar display correctly despite the rounded corners and front camera.

The photo and video capture app lags far behind what Android offers. (Slow focus, macro function, wide angle, panorama.)

Bluetooth could be improved (although I find it usable with certain prerequisites).

Allowing much faster GPS positioning would be appreciated.

Activating Lomiri via the fingerprint reader would be a plus (no longer having to press and then hold your finger).

Applications
I think that a precise description of what you get by installing UT versus what you lose by changing ecosystems would help reduce disappointment.
Make a thoughtful choice and stick to it.
A few articles on which applications can replace popular Android applications.
How to get VPN or OwnCloud or ... working.

The gaps, for me, are banking software and government apps. (Hence my use of Waydroid.)

An app for backing up data and syncing with your PC. (Damn, they removed rsync.)

Offer correct and appropriate snap applications to close some gaps?

@donieck
That's a possibility, which is why I suggested reinstalling the latest OTA for 20.04 to confirm or disprove this hypothesis.

@donieck
Another option would be to contact your operator to check how to connect your phone to their mobile network (or search for this setting among other users of this provider).
Usualy

in System settings / cellular / Provider and acces point name / Access point name / internet (sorry for the labels retranslated from french)
You'll have to restart to phone after any change.

@donieck
Hello.
Could you to downgrade to 20.04 stable with UBports installer ?
If the SIM card works with this release, try to return under 24.04 stable.
And if the problem is back, please tell us in https://gitlab.com/ubports/porting/community-ports/android11/xiaomi-redmi-9/xiaomi-lancelot/-/issues

@ubuntoutou
Brute force...
Excellent username!

Hello.
Listening to Alfred yesterday during the Q&A (very interesting, as was his conference on UT, which is a must-see), I wondered why it wouldn't be possible to free up space by modifying the UT installation process.
First, install the OS without any applications, and then, on first boot, download the applications that are currently included in the OS and install them in the user space.
This would save space and solve the strange behaviour encountered when attempting to uninstall these applications.

@UBportsNews
The use of snap packages under UT takes place in a specific context (AppArmor, read-only file system, custom OS implementation, etc.).
Are there any links where information is available to understand how snap works in this context?
Thank you to everyone who gives their time and skills to advance this essential OS.

@ozzy03
Hello and welcome.
There is a dedicated Telegram for this purpose:
https://t.me/ubports_devel
and for apps
https://t.me/UbuntuAppDevEN

@gpatel-fr
Not so hard and usefull
you must know which yaml file is used for the wifi in /etc/netplan
as root cd /etc/netplan and cat yaml files.
nano 90-NM-5f1fe55a-2996-4485-b6b3-a75fe76edc62.yaml (ie)
Then in the wifi one
replace

      dhcp4: true 
with
      dhcp4: false
      addresses:
        - [your wanted IP]/24 (or less)
      routes:
        - to: default
          via: [your router IP]
      nameservers:
        addresses: [your DNS1, your DNS2]

save it
and validate it by
netplan apply

@gpatel-fr
You could fix IP (as I did)

@gpatel-fr
It looks like things has changed since the tests we made in march...
Sorry I haven't verified that it was still working
I had some trace in terminal launching (as the service)

sudo systemctl stop ofono.service
sudo /usr/sbin/ofonod -d -P ril --nodetach

To run it as a service
add "-d" to the ExecStart command in /usr/lib/systemd/system/ofono.service.d/lxc-android-config.conf

@gpatel-en
Perhaps you could get more information by putting ofono into debug mode.
stop ofono then
/usr/sbin/ofonod -P stktest,sap,udev,dun,smart,hfp,hfp_bluez5,provision,binder --nodetach
I used it with Marius to know if voLTE was enabled on Xiaomi Redmi Note 9 Pro.
Then you can check 'journalctl -rb -u ofono'

To know if voLTE is enabled, the call experience is really not the same:
Short connexion time and voice quality better.
If the other phone you call is on Android, you will see if it's in voLTE.

@Biplabro
Hello.
Are you connected via ssh or adb?
In that case, the command to copy is CTRL Shift C and the command to paste is CTRL Shift V.

To change the UT interface (which suits me perfectly), search for Launcher modular in the OpenStore.

@zakafx
Because I respect UBports desire to distribute a read-only system that provides users with a secure and controllable experience by default.

@k.blitz
I will respond to you in a private chat.
I do not wish to spread subversive ideas on the forum, but I share the belief that everyone has the right to know and experiment (at their own risk).

@domubpkm
OK, did you change the update channel to RC?

@pparent
On my phone (Xiaomi Redmi Note 9 Pro), in System Settings/Mobile
I can check 2G/3G/4G
and in Operator and Access Point I can check 4G Calls (VoLTE)
(not always immediate)