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Most modern Android devices allow storing large photos of each contact.

I tried exporting all my contacts, then importing them. All the large photos were lost.

How can you backup the large photos associated with each contact?

2

Backup and Restore

Following the app recommendations made in this XDA post How to backup local contacts with their high res pictures ?

I set a hi res 1984 × 1800 picture for contact and backed up using Super backup: SMS and contacts , took a backup , deleted the contact and restored

To my eyes, it appeared to be high resolution as originally​ set

The other app was not tried as it was pointed out in app review that it didn't work beyond 720 resolution

I tried to locate the storage of these high resolution pictures to manually verify the restored file size but couldn't. Method described in Where does android store contact photos ? didn't work


Edit

It turns out that my suspicion was well founded !

  • As an aside, contact thumbnails ( used for notifications, messaging applications ) which are scaled down to 96 by 96 can be scaled up to 256 by 256 by this Xposed module Clarity

Bottom Line: Any contact picture irrespective of original resolution will look no better than a 720 by 720 resolution, whether you use an app , Gmail sync or for that matter in any manner

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