Some members say they don't get the option to post images to postings.
So Normally changing browsers is the sollution. You then get a meny above the box where you can Add links, images, video and other things. The rest should work then just fine
Hope this helps.
Had a look on the possibilities (I use an Android myself too). You can't upload photo's on the mobile website. You can however sent images by e-mail to upload straight to the website by a special generated e-mail address for each member. You can find the details on your own settings (access through the main menu page).
Let me know if it works. Will test it myself too...
testing with the sending of an e-mail with an image attached worked. The image just showed up at the website. So you can send e-mail with attachment (photo) to the specific e-mail address generated for you, and it works. Only the sender has to be (use) his own e-mail address as to which he is identified with logging in.
Hope you can test this too...