You can still install some scopes from Canonical Ubuntu store. Maybe not all, but most yes.

1. If I place a phone call I cannot hear anything unless I plug the phones or put it on loudspeaker? Is this a bug or do I have to put some feature on somewhere in the options?

2. The calls and ams scopes no longer exist? They were very useful... How can I get a listing of the phone calls history with ubports?

Anyway I can share my experience with ordering my spare screen: As you can imagine, it was not easy. First of all Meizuworld was a no go, they don't seem to accept orders from outside China. So I registered an account in aliexpress and made a search for a replacement screen. I was a bit weary from ordering from some random supplier there so I decided that I would pay through paypal to have some sort of protection. This already limited my options since most of these China suppliers don't accept paypal. Still I was left with about 10 stores with an acceptable range of prices. Then I put orders for the screen with int. Shipping and in 3 cases I got refunded and my order cancelled with no explanation. At the 4th attempt a supplier from Hong-Kong did ship it. 1week attempts at purchasing plus about 3weeks shipping (with very nice tracking and packaging). I also ordered a plastic case for my phone from another supplier using the same method. doing

This is what I would suggest doing, but it takes time...

I tried anther chip and it works, so for some reason my SIM is malfunctioning, will get a replacement one...

I've been slowly reinstalling stuff, I noticed that the GPS has trouble working, although it seems to be recognised, but I remember it was already difficult when indoors during the days of canonical. Accelerometer works, but the compass app doesn't seem to be working. Minor hurdles...

Anyway, by request I uploaded my ubuntuimage folder from /root/.cache the link is below:
https://www.dropbox.com/s/0464g6vpm6kzgsb/ubuntuimages.tar.gz?dl=0

It's gonna be a pain in the ass re-importing the contacts, calendar, etc... is there a list of the relevant hidden folders anywhere?

I'm thinking that it is probably not only you having this problem so now when you have both his working files and your non-working files in the cache, could you try to compare to see if you can find something that looks wrong about them? In particular the files keyring and image-master files that looked strange in your log print would be interesting i think.

Anyway I flashed all the partition images you sent me, and soon enough I had ubports booting!

I cannot state how much I am grateful for your help, you have been most kind in helping me, I was going nuts oer this. THANKS!

Now I just have to figure out how to make my SIM work again (I never could get it to work in anything else than the slim slot with the canonical image, and now it doesn't seem to recognize the sim in any of the two slots, but thats probably an hardware fault I have had since the beginning, these meizu 5 phones are known to have random hardware issues).

In any case, I have internet, camera, and hopefully GPS already working, so it's already a nice start. Thanks again Stefano!

Hope it works. ( I did once the same time when I had a similar problem and then it all works like a charm) Fingers crossed.

720.0 # tree
.
|-- system
|   `-- etc
|       |-- system-image
|       |   |-- channel.ini
|       |   `-- config.d
|       |       |-- 00_default.ini -> ../client.ini
|       |       `-- 01_channel.ini -> ../channel.ini
|       `-- ubuntu-build
`-- version-1.tar.xz

as for the keyring file:

729.0 # tree
.
|-- device-60f53a5768e9340729d3a5ef9263bd3a9726792e7d0dbf830e5b124938dd419a.tar.xz
|-- device-60f53a5768e9340729d3a5ef9263bd3a9726792e7d0dbf830e5b124938dd419a.tar.xz.asc
|-- keyring-4c4e7ef380ebcfa2c31084efa199138e93bfed8fc58aa3eb06bdf75a78af9b57.tar.xz
|-- keyring-4c4e7ef380ebcfa2c31084efa199138e93bfed8fc58aa3eb06bdf75a78af9b57.tar.xz.asc
|-- system
|   `-- usr
|       `-- share
|           `-- system-image
|               |-- archive-master.tar.xz
|               `-- archive-master.tar.xz.asc
|-- ubports-d50c18b27590af5734a826c4f7857d8909b0e0f902d21af142a780620c8eb58b.tar.xz
`-- ubports-d50c18b27590af5734a826c4f7857d8909b0e0f902d21af142a780620c8eb58b.tar.xz.asc

In any case couldn't it be possible to manually download the kernel files and flash them like I did originally for the canonical ubuntu-touch? I used the method from this link: https://askubuntu.com/questions/767323/how-to-install-ubuntu-on-meizu-pro-5-that-was-originally-with-android

I would need a kernel-OTA-15.zip (with boot.img, dtb, logo.bin, ldfw), ubuntu*.tar.xz, device*.tar.xz, custom*.tar.xz, version*.tar.xz. Basically doing whatever worked in the past with canonical...

Anyway, there seems to be nothing wrong with my partition table as shown by the command below...

746.0 # adb shell sgdisk --print /dev/block/sda | grep -v GUID
Disk /dev/block/sda: 7633920 sectors, 29.1 GiB
Logical sector size: 4096 bytes
Partition table holds up to 128 entries
First usable sector is 6, last usable sector is 7633914
Partitions will be aligned on 64-sector boundaries
Total free space is 11386 sectors (44.5 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            1024            1279   1024.0 KiB  0700  private
   2            1280            1343   256.0 KiB   0700  proinfo
   3            1344            1407   256.0 KiB   0700  misc
  21            2048            3071   4.0 MiB     0700  param
  22            3072            5119   8.0 MiB     0700  efs
  23            5120            5631   2.0 MiB     0700  pnv
  24            5632            6655   4.0 MiB     0700  ldfw
  25            6656            7679   4.0 MiB     0700  dtb
  26            7680           13823   24.0 MiB    0700  bootimg
  27           13824           22015   32.0 MiB    0700  recovery
  28           22016           30207   32.0 MiB    0700  bootlogo
  29           30208           35327   20.0 MiB    0700  rstinfo
  30           35328           40447   20.0 MiB    0700  mnv
  31           40448           45567   20.0 MiB    0700  reserved1
  32           45568           50687   20.0 MiB    0700  reserved2
  33           50688           55807   20.0 MiB    0700  reserved3
  41           65536          720895   2.5 GiB     0700  system
  42          720896          851967   512.0 MiB   0700  custom
  43          851968          983039   512.0 MiB   0700  cache
  44          983040         7633914   25.4 GiB    0700  userdata

So, i think you should check the content of those two small files and try one more time to clear the cache. I.e: rm -fr /root/.cache/ubuntuimages/.