I'm a newbie on Windows Phone, I spent time on iOS and Android before and use the instant upload feature as well.
I found that on the Windows Phone, there's an option to upload Camera Roll pictures to SkyDrive which is as similar as Photo Stream or Google+ instant update did. But the problem is there is no option to tell it just upload via WiFi only, not the data plan (GRPS/EDGE/3G).
Because sometimes I capture picture while the 3G is on and do not want my phone upload it, that will eat up my data. I only have 400 MB of high-speed bandwidth, thus I'm don't want a ton of data transferred via cellular data connection.
So how can I set that feature just works on WiFi only, or prevent it upload via 3G?