Upload panorama (360 image) to facebook at runtime

I made an app where the user can capture 360 degree of the surrounding.
Then I saved it to Application.persistentDataPath as I am using android.
It is saved but it lacks the ability to add “camera maker” and “camera model” fields to its EXIF.
I googled for a week now with no hope … all I can reach is how to read EXIF …but I can’t write one.
And even If I did write the EXIF it won’t be able to upload to facebook as unity strips the EXIF again when loading assets :S
I hope someone can help me … IT IS VERY FRUSTRATING

any help?