My Dear UBports Friends, @Moem and @Keneda, hello again and sorry for my late answer/s... I'm trying to improve my UT skills and it takes time...

Dear @Moem,
20). Thank you for the information that no community member has ported to 16.04 my phone/s, which were sold originally with UT on them 
21). Yes, these phones are from ~2015 when the UT was launched initially
Well, I understand the specifications concern/s. Therefore, let me take in consideration only my strongest UT phone, i.e.: Meizu Pro 5. It has 4GB of RAM, 64GB of HDD, Dual Sim / micro SD (256GB works), Exynos 7420, USB-C, Flyme 8.0.5.0A (Android 7) from 2022. I'm trying to get involved into the porting process, here: https://forums.ubports.com/topic/9051/try-to-upgrade-the-port-of-meizu-pro-5-using-halium-7-1
22). I value it highly because it was one of the first UT Phones but also it is a perfect candidate for the "Cable Convergence". For health reasons I try to limit the exposure to radiations
From what I can see, the UT Phones seem to offer the "WiFi Convergence" only, if I correctly understood (?). The Old Good Nexus 5 was offering the Convergence via cable and I also remember from one of the threads that Meizu Pro 5 was unique in this area too 
23). Well, I believe there's a Huge Number of Meizu Pro 5 Chineese Version Phones which are on Chineese Market, still in use, after the Flyme 8.0.5.0A (Android 7) was released on 2020-07-14.
24). However, I think that this is not only the question of numbers but also the fact that "Meizu Pro 5", "Meizu MX4", "BQ Aquaris E5" are the first Ubuntu Phones that were launched in the world - that's why I would like to conserve them, to be able to show how the UT history was starting and how it continues...
I do not expect to quickly get the possibility to use them forever with every new UT release
However, I'll be happy to get involved in any porting attempt
I will also keep eye on their availability on the Market, having in mind that you mentioned that Topic 
25). Well, I got a little bit crazy for FP and yes, I would like to get a Fairphone if I find a used one, at a good price 
Dear @Keneda,
26). Thank you for the explanation what's needed to port one of my UT phones to 20.04 :). Now I understand that this is a Challenge!
27). I'm also very grateful to UBports Developers that they assured at least the 16.04 for my UT 3 phones (Meizu Pro 5, MX4 and BQ Aquaris E5)
As I said, I'm ready to get involved in their porting to 20.04 and futher... 
28). I'm so sorry that these batteries did not work for you...
The batteries are still working in my 3 UT Phones as I keep them in the drawer for all these years and I re-try them when a new UT Release occurs.
29). Yes, I read a bit about Fairphone and as I wrote above, I got a little bit crazy/addicted to FP...
I created an account and I started to collect points, with the idea that one day I'll be able to get their phone at a lower price 
30). Previously you mentioned that "another good choice is Google pixel 3a" - how long could it be supported on Ubuntu Touch? I checked that "The Pixel 3a reached its end of life (EOL) in May 2022 and won't see a software update ever again — it is stuck on Android 12 forever".
Dear @Moem and Dear @Keneda, thank you in advance for your further Feedback and I wish All the Best to Both of you and kind regards ~~ Piotrek~~pe3no