[ZenFone 2 Q&A, Help & Troubleshooting] major9686:
I'm on a Japanese new phone which was never rooted (but sent to repair twice for bad front speaker/earpiece and motherboard)

It currently on Android version 5.0

Japanese version 2.15.40.13

The Phone doesnt connect to the PC, I've tried normal connection with windows explorer, tried the Asus application.

The phone either appears as empty or appears and then suddenly disappears, on and off. I can't even view the contents let alone copy/move/delete. (from the computer that is)

Is there another option to move files to the computer beside dropbox? which takes up my bandwidth and is kinda slow.

I've seen on ASUS site that there are 3 official 2.20.xxx versions yet my phone doesnt recognize anything when I press the CHECK FOR UPDATE.

Is there a way to update it without rooting ? and without doing a factory reset ?

Thanks in advance.

EDIT: I've tried this:

https://www.youtube.com/watch?v=FtQeVbKT6Zc

But I dont get the Update pop-up.

Also, Do I need to put the next available version, and update in order or just the newest/latest one ?

EDIT 2:

After a while I noticed that it didnt even copy the file to the phone.

When I connect the phone to my PC (windows 10) via USB 2.0 and/or 3.0 a folder called z00ad shows for a few sec. then disappeared.

I tried to several cables and ports.

sometimes it shows as an empty folder and sometimes I can see the folders inside but then it disappears and I get an error message.

I've got developer rights or access by tapping the kernel version.

I've enable the install by third parties option.

I've disabled the lock

disabled the screen off timer

Is it a Windows 10 thingy ? (I got the new Intel Driver for android)

EDIT 3:

Uploaded the file to Dropbox and downloaded on my phone, saved with ES File explorer to main directory, reset the phone, and now its updating. (UL-Z00A-JP-2.20.40.174-user)

When its done I will update for the next update (UL-Z00A-JP-2.20.40.183-user), and then the latest one (UL-Z00A-JP-2.20.40.185-user).

Hope Android 6 will arrive soon :( and that all of the problems are software related and not hardware...

Only trouble with this phone :(

EDIT 4:

Stuck on the INSTALLINg sYSTEM UPDATE... screen.

Its been like that for over 10 min. now, the blue progress line is stuck somewhere between the G and S (installinG System)

How long should I wait for it to finish? I saved the update file to the built-in memory, not the SD so speed shouldn't be an issue right ?

If its stuck what should I do ? Turn the phone off? Reset ? will I lose all of my files/photos?!

For this guy the problem solved itself after almost an hour...

http://xdaforums.com/zenfone2/help/stuck-installing-update-t3151529

I will try to give it 2 and see how it goes :(

EDIT 5:

After almost 2 hours my phone was updated.

Yet still connection problems to the PC.

I'm trying the next Update, maybe it will fix this issue.

I've read online and I can't seem to find a solution.

I've tried different cables and connected to different USB slots but still, either I get no detection, or a detection with empty drive, or detection with external and internal memory but then it quickly disappears. The phone itself still keeps charging so it must be connected properly.

Has anyone else had this problem ? (I also had it while I was on Win 8.1, now win 10)

EDIT 6:

After doing the 3 available updates, manually... for around 6 hours ... I still cant connect the phone to the computer :(