when posting pics, look at the "post options" below the "post icon" section.
you will see a paperclip with a highlighted "attachment manager", and [total files : 0]
click on that.
you will then be directed to a box that says :

Attachment Manager
File Caption (255 characters max)

[then a box here that says ; "select a file to attach" and a box that says : "done"]

or drag it here
Maximum size per file is 4 MB.
Attached Files
You can attach up to 4 files total.
This post does not currently have any attachments.

you can then insert up to four pictures from your "storage", at which time a message will appear that says "you have reached the maximum amount of attachments" [or something like that]
if you only want to post up to three, there is a box that will come up saying "done" [or something similar] you click.

it really is a lot easier than it sounds.
if i can do it, a "cave man can"......... biggrin
however, i only have a desk top setup, so i can't say anything about a phone. [except i can make phone calls on one. laugh2] some phone users say it works, while others say it can't be done.
beer