Do you mean adding pics from your phone to this thread? If so, once you have a screenshot / picture of what you want to share, you will need to have the picture 'hosted' somewhere... there are tons of free image hosting sites, you'll just have to make an account. Photobucket.com is hugely popular, as is imgur.com
To show the picture here, click on the Insert Images icon from your post and insert the URL to your photo at the hosted site and BOOM goes the dynamite -- instant picture in thread.
http://i1018.photobucket.com/albums/af304/Lactose_the_Intolerant/dogsmile.jpg (this is the direct link for the picture below)
this is what happens when you click Insert Images and paste in the link above.