Here is what i do, all from my phone.
1. take picture
2. edit it in a photo editing app i have: resize, frame, etc.
3. upload to photobucket (need that app too) from my phone, on mine this is one of the options under the "share" button; if you have the photobucket app then photobucket will be a "share" option just like facebook, twitter, etc.
4. when upload is complete, open the photobucket app and you can copy the IMG link.
5. Open the forum and paste the link into your message.