[Cglrcng]

You can post them directly from a computer, just must click edit, then choose resize/pixel size, resize the largest of the 2 numbers (in height or width to 800 pixels), choose save as you exit each pic, (copy and paste them each into a folder (that you will create new, rename the folder ("Resized pics"). Then you can post those directly without using a hosting site (by choosing the paperclip above, go to that folder (resized pics), check the ones 1 at a time to add, upload the list, then revisit the paperclip and add them to the post. (There you can choose full sized -they will be an acceptable 800 max pixels in size, or tiny thumbnails).

Sizing is the key...anything on your phone is going to be really large in pixel size (and will be rejected by most websites). It sounds complicated above but it really goes fast to edit pics...just use the Microsoft paint program to edit.