For now just edit the picture on your phone. I do it all the time. All you have to do is shrink the picture before posting it.
Go to the full version of the SOL website and post unedited. Typical of the raw photo posted that is a problem.
Edited by simple crop on the iphone and done. Till the new interface happens this is how I've been doing it.
on my phone there is not an option to post a photo or upload attachments as is the case on the laptop.
If you use the search you will see this been answered several times with screen captures showing the work arounds. I know because I posted some.