Android phone instructions for uploading photos.
At the bottom of the 'quick reply' box is the 'Use Full Editor' button. click it!
That opens up a"New Reply" box.
Scroll down past the emojis and you will see a paperclip with 'Attachment Manager' beside it.
Click the 'Attachment Manager'.
This opens up a window that has a button 'Select a File To Attach'.
Follow the instructions given previously about captions,then click 'Select A file To Attach'.
Select the photo you want.
When your photo has loaded click the 'Done' button.