judging from the kind problem you are facing, I believe it is the app problem, and not the phone.
I have used oovoo myself, but never received an image ever, so don't really know. perhaps the app doesn't allow to save the pics to the gallery just like that. have you tried opening the pic in the app, and looking for an option to save them manually? there should be one. WhatsApp beta has it. it doesn't save images in the gallery too, if the auto save option is off. you can only access the image in the app, or in the gallery only if you save it manually.
just see if you find some option in it.i shall download the app myself and try to find a solution for you. till then, as a workaround, I suggest you take screenshots of those images in your "my media" so that the image gets saved in gallery, but under screenshot section. :)
12-18-2016 05:10 AM