Sorry, but I do not see the point for the discussion. We can share our ideas, but it seems that some posts are arguing against others.

I am not a teenager, lets say I am mid-age, but the BQ4.5 was my first smartphone! I did not want to have an iPhone or an Android based one, nor a WindowsPhone. So when Canonical launched this phone I though it was the right time to buy one. I am not a tech-geek nor a developer but I like to go against the tide. I am also, alone at work, using an Ubuntu as desktop among all the MS machines.

Surprisingly Canonical dropped its development and I felt disappointed. But thankfully UBPorts took it soon up again.

It has served me for 7 years. Some errors raised, some drawbacks, a reflash, etc. but in my opinion, it is a reason to dive into linux and something to enrich the experience. That is why I bought it.

Everything has an end and I understand that the involved people have their limits and also their desires. Why not? For instance, the may want to focus in newer devices to explore new capabilities. And that is marvellous.

As far as I am concerned, I will still use my BQE4.5 as my daily drive. I can make a phone call, send SMSs (sorry I am not a fan of social networks such as Whatsapp, Telegram, Twitter, Facebook, Instagram, etc), I can send an email (Dekko2), I can navigate offline (PureMaps, UNav), I can read all kind documents (DocumentReader, SimpleReader, Seabass2), I can navigate (Morph), I can sync my calendar, I can take pictures and videos (they are not very good really), see them, I can even control my PC remotely (CuteVNC), and much more. Brian posted a list of the main downloaded apps in the General section of the forum and some are mentioned above.

It is not the most powerful device, nor the faster. But it really works. It has all the needed features, although it takes 3 s more to launch an app Who cares for 3 s!

I will not have updates. OK. I am sure that behind the curtains the improvements of each OTA are HUGE, but for common users as me, I suppose I will not lack them too much.

If the battery fails or, as it actually happens, the centre of the screen does not respond to my fingers, it is a hardware issue, not related to UBPorts or the software, but to the natural (programmed?) obsolescence. As I said, I like to go against the tide, so I keep using the phone even if I can not click on the number 5 of the telephone app. But then, there is UT Tweak Tool, to change to windows mode and move it to the working part of the screen. There is always a solution.

If any has keep reading until now, congratulations. What I may do to secure I keep using it, would be to download such apps that I may use in the future and keep a copy of the code (it is downloaded and stored in the phone: /opt/click.ubuntu.com). If ever I need one and it is not available in any repository I could still use it. Because even though they will not have the latest features, they work. I am grateful to all the developers that have done it possible.

done.
wiped, reinstalled and working like a charm.

Hi @AmauryDBZ. Sorry, I am not a developer, so I cannot provide any hint. I usually use a trial and error approach. You can try uninstalling the package and reinstalling it again.
Actually for me, the first time it was not properly installed because I lost the wifi connection. I tried again and although I had some doubts (see posts above) it works.
My phone requires some time to connect to the satelites, but once it is done, Activity Tracker followed me.

I own a BQ E4.5 of the first batch and it is updated with the last OTA (OTA-21).
Apart from the centre of the screen not responding to finger touch it works great . This is a common failure for this device, according to some other posts I have read in the forum.
I only use one of the SIM cards, so I cannot say both work, but one at least if working properly.
So does the SD card, where I store the photographs of the camera and the maps for OSMServer.
However, yours maybe is a failure of, unfortunately, your devices @mardy @SaimonC.

I use Notes with Evernote, so I can have the notes in my desktop too.
So 2.
No mind to drop Evernote if there is another way to sync with the desktop, but I would prefer it through a core app as the default Notes.

@Flohack maybe I did not explain it clearly. My device is now booting properly without any fix.
I do not need to reinstall it.
I thought it may be an interesting information to those who are still struggling with the boot isuue.
Thank you anyway.

Well, actually I had not used "Pictures" but the translation to my language. It seems that for saving in the SD card, "Pictures" is mandatory.
Maybe I am wrong but at least now I can save wherever I want to.

Thanks @arubislander,
I can see that Wired External Monitor is not supported, but Wireless External Monitor is.
Assuming that the projector also has that feature, I suppose you connect directly to the projector via WI-FI? In that case, can you also surf the web while projecting or your connectivity to the www is unavailable?

Can this device connect to an external projector via the usb-C port?

@Charly As Rinigus mentioned in another thread:
"At present, you have to use default location, close the server, move it to the location you want and make symbolic link from the default to the new location."
I have done it and works flawlessly.

Dekko2 settings have an option to delete messages older than a given date (one week, one month). Settings --> Accounts --> Manage caché --> "Clear now" button.
Don't know if it really works though.
UTTweakTool shows that I have a caché of 11.25GB!!!, even though my BQ4.5 does not have so much storage.
After clearing messages older than one week following the previous method, UUTT shows a caché of 10.96 GB. Something has been erased, but obviously there is something wrong.
You can clear the caché in UUTT but beware! It also erases the configuration, so you must introduce all the accounts from scratch. I think there alraedy is a bug opened with this issue.

@lduboeuf I had a look to your link. I can see the following line:

framework: ubuntu-sdk-16.04.5

However, your CMakeList.txt file shows:

    set(CLICK_FRAMEWORK "ubuntu-sdk-20.04")

I guess it does not matter since you can build the app.
I am struggling with this issue. I installed clickable in my desktop machine (20.04) but want to develop the app for my BQ 4.5 (Xenial, 16.04). Although I have manually changed the lines in the apparmor file from 20.04 to 16.04,

{
    "policy_groups": [],
    "policy_version": 16.04
}

it still complains when I tried to build the click package:

 - security:policy_version_matches_framework:phonehome.apparmor
	16.04 != 20.04 (ubuntu-sdk-20.04.1)
	http://askubuntu.com/q/686347

The provided link does not consider this ubuntu versions, but I guess 16.04 should be valid. I have consistently introduce

    set(CLICK_FRAMEWORK "ubuntu-sdk-16.04")

in the json file, but without luck.
I do not know why clickable insists in 20.04, when none file has this version number typed.

In the OS category there is a topic about background location that may be interesting for your GPS issue.
On the other hand, I think nobody would had though about disabling the volume buttons. You may want to use them for your headphones even with the phone locked.

I am happily still using a BQ E4.5 so there is no other option.

Why have I been downvoted?
I was just reporting an initial weird behaviour, but finally a succesfull performance.

Hi @AmauryDBZ. Sorry, I am not a developer, so I cannot provide any hint. I usually use a trial and error approach. You can try uninstalling the package and reinstalling it again.
Actually for me, the first time it was not properly installed because I lost the wifi connection. I tried again and although I had some doubts (see posts above) it works.
My phone requires some time to connect to the satelites, but once it is done, Activity Tracker followed me.

It works.
I tried it with Activity Tracker and records my position with the phone locked.
During the first try, the location switch turned off automatically whenever I turned it on. But now the switch and me seem to have achieved an understanding.
Thank you very much for such a useful feature.