How to delete synced photos from iPhone without connecting to mac? I have synced a folder which contains some pictures to my iPhone. The synced photos are successfully copied to my iPhone. But I can not see any "delete" option in my iPhone to remove the synced photos.

The "Camera Roll" which has the pictures that I took via the iPhone's camera have an option "delete" in the bottom of the picture. But synced photos does not have that delete button.

Should I use iTunes/Mac to delete synced photos? Can't I delete the synced photos with a single touch?
Synced Photos deleting must be done through iTunes. To do so just:


In iTunes select the device icon in the Devices List on the left. Click the Photos tab in the resulting window.
Choose Sync photos from, being iPhoto or Aperture on a Mac and Photoshop Album or Photoshop Elements on a Windows PC.
Choose Select Albums and deselect the albums or collections you want to delete.
Click Apply.