Note that The connectors have a rubber-like Top surface. Make surre The spudger is inserted underneath that rubber piece. To disconnect, The connector ha to lifted upwards from the PC-Board (i.e. Orthogonally from the electronics board, as opposed to being moved sideways). holds true for all of those connectors, except for the one with the flip-tab.
Quote from lolsen4:
On my 3G, the piece that flips up on the #3 connector was black and the connector itself was white, seemingly opposite of the pictures. I mistakenly tried to pry up the wrong piece, but fortunately didn't do too much damage before I realized this. My phone was replaced on warranty in February so this must be the case in some newer 3G's.
Maybe it adds Value to the explanation to say that the piece that needs to be flipped up is located on the opposite side of where the ribbon cable exits the connector. It needs to flip upwards towards the ribbon cable.
My confusion was to identify which connector I have in my phone, since everything in there is so tiny that it is hard to identify which is which. Maybe a zoom-in on the connector with the tab flipped up would be a good addition to the instructions also.