I've been looking at pictures and video's of the n9 being disassembled, and that's why i asked here, i can't tell from the pictures whether the broken off plastic bit is broken off from the part pictured above or from the outer casing.

Based on pictures, both the casing and the pictured separate part have a perpendicular piece of plastic at the place where the simtray would latch and i can't tell which of the two it actually latches behind.

I was hoping there'd be people on here who have dismantled their n9 before who could tell me for sure whether a new housing would fix my problem.