Mobile App Pictures Quality and groups

Hi all, I have quite a few pictures that I have uploaded to my mobile app. Once uploaded, the quality of this is really really low. Is there any chance we can keep the original quality of the picture?

Also, any chance we can upload more than just one picture on each conversation (groups on mobile) and reajust where we want the picture to be in the conversation (at the moment we can only upload one picture, and this is stored at the end of the onversation).

Thank you!