[Galaxy S 4 Mini Original Android Development] BeeJ1109:
Hi arco68,

Thanks for reply.

I sent you a very detailed info about these issues above.

I have also added the recovery.log for you to read.

I could had copied that text here. I thought it better to contact you direct.

I am comparing both builds on 2 of i9195T phones, to allow direct comparison of LOS 16 vs LOS 17.1

I have another 3rd phone same model that is on Stock.

All phones are LTE versions sold in Australia by Telstra, largest carrier in OZ. I worked for Telstra in Radio & Mobile Networks for 45 years. As a Mobiles Technical Specialist for 25 years.

So I decided to use my 7 years old phones to experiment using latest Firmware created by Yourself.

In short your TWRP v3.4.0 is installed and worked to Allow Nandroid Backup to ExtSD card in both LOS 16

& 17.1 versions.

TWRP on Version 17.1 phone was now NOT working, after a day or so of testing.

Update on issue above^

I found that I was holding the 3 keys too long, causes it, to reboot into ROM LOS 17.1, instead of TWRP.

So I released sooner, after Yellow text appears on screen. Screen goes to black and shortly after TWRP v3.4.0 starts with logo, then finally menu buttons appear. Checked out ALL Functions - ALL Working again.

Then did a NANDROID BACKUP.

So As it is working as expected, there probably was no issues in the first place.

Starting up the phone will vibrate, black screen , a short wait the LOS three rings appears, and finally the 17.1 ROM is Fully functionable.

{My Replies to hints provided by arco68.}

2. Yes correct removing battery is what us Techos, call a "Master Reset". That will fully Power down the device, leave it out, long enough for any residual charge stored in components, left is Fully discharged.

3. I realize with your comments - ROM is nothing to do with Recovery, different PARTITIONS within phone memory and yes I can get into download mode.

Most apps installed on both are from same sources, same procedure used to flash ROM, both via same TWRP v3.4.0, added Magisk.zip v20.4 to Root each Phone via TWRP. Both created NANDROID BACKUP via TWRP, as well as update.zip files for each ROM, as well as system, data inc. apps, and another update.zip with apps and data only. Created for Both LOS ROMS.

Then ALL versions of Backups are moved to each ExtSD card, installed in each phone

Created similar Titanium Backup Pro, in separate subdirectories on EXTSD cards, same as described above, for TWRP NANDROID BACKUP files.

So basically both phones, are identical with exactly same, but separate hardware.

All Installing and Flashing procedures, exactly the same.

Only difference is the ROM builds, LOS 16 STILL WORKING.

LOS 17.1 ROM previously had 2 Problems.

1. TWRP now Working.

2. Titanium Backup Pro. once fully FUNCTIONAL, now also working.

I was going through all settings, in Android 10 phone, found a few apps, needed access enabled to extSD card, as well as, access to location. So many settings to list here.

Found apps that measure WIFI channels and levels, Internet Providers, upload & download speeds.

Battery stats, Titanium Backup that refused to start, checking all settings, correcting apps that had mysteriously been locked out, by Android 10.

Maybe this new ROM, has a few hidden issues, that are not there, in previous Android builds.

Can not explain, what happened, but LOS 17.1 at least it is working now, exactly same as LOS 16.

After comparing apps' settings between each ROM on each individual phone. Compare and altered any differences, suddenly ALL 20 apps are working, on both ROM versions.

So extensive testing, have given me grief in LOS and TWRP on same device, whereas the other device was working GREAT.

Sorry about the very long post, but I am only trying to give you my experience with your latest updates in ROM and TWRP.

{SO checkout the PM on Telegram for more info and recovery.log of failing device.} - I will delete Telegram PM post. As I have fixed my issues.

{ I have removed a lot of the text, from previous post, as it is now irrelevant. }

As the problem has been fixed. Too many settings within a few apps, mysteriously got changed, therefore stopping the apps functioning, as developed.

So Thanks for your assistance, and hints. To fix something, that was probably was not faulty, in first place.

Now that I have working Backups.

I could probably wipe and reflash as new install, then install apps again, see if I get the same result, as before.

But I think Android 10 has some issues to be solved. Especially Read & Write Access to ExtSD cards.

Even though permissions have been granted, via settings or Root access overriding Android permissions.

Great work on your latest ROM builds on OLD model phones.

Much appreciated by us ALL.

Cheers