Mysterious small piece of white rubber

Don’t really know where else to ask this: having had to take apart my FP2 to check the screen, a small piece of white rubber, about 2.5cm long fell out (there should be a pic attached to this post. And I can’t for the life of me work out where it fits. Phone seems to work fine when put back together, can’t find any schematics that show it…Anyone have any ideas? Thank you!

A post was merged into an existing topic: What is this part?