I'm reassembling an iPhone 3GS with a new back cover; I also bought:
- a new silent switch/volume/power flex cable
- a new silent switch holder
- a new outer silent switch

I glued the flex cable to the silent switch holder and tried to assemble everything into the new back cover, but the switch is loose and even if it may work, it doesn't stay into the right position. It seems there is too much clearance between the actual switch and the outer plastic thing