[Q] How to backup local contacts with their high res pictures ?

Hello,

Since I got a android phone, I always had an issue when exporting/importing my phone contacts.
When I flash a new ROM, I'm used to export all phone contact to a .vcf file, then reimporting them after. I use the standard stock contact app feature.

BUT, after having re-importing the contacts, all the pictures contacts are systematically pixelated, and I have to set all the contacts photo again. It's very long, It takes ages.

Does somenone know the solution of that terribly boring problem ?

I know there is 2 pictures associated to each contact : one in lower resolution, used in the app, and the other in 720p resolution we can see when a contact calls us for example.

I've tried many ways to solve the problem : dump and paste the database contact in /data/data/com.contactsblablabla/databases (with, of course, reboot and chmod) and some other stuff like that.. I have explored the contacts database, but no way to find how to solve.
I'm tired of searching, 10 years android exists, there is at least one solution to this courant problem ! I've never found yet.

Any ideas ?

from xda-developers http://ift.tt/2643vtF
via IFTTT