Recently my Nokia E5 phone had been malfunctioning in a common way for the model that involves the headphone jack [1] and since it was out of warranty I decided to take it apart. What I found inside filled me with a newfound respect for Nokia's engineers. The phone's mainboard attached to the case with just 4 Torx screws and the replaceable modules like the headphone jack module and the LED flesh simply set in small compartments inside the back cover assembly. The modules connected to the mainboard through exposed flat contacts that would be held against similar contacts on the board when the phone was assembled. There were no tiny ribbon cables except for the one connecting the display. Ultimately, I was able to repair the phone by rubbing the PCB contacts that corresponded to the headphone module with an eraser to clean them.

I had previously disassembled an HP Palm Pre 2 and it wasn't pretty at all by comparison -- too much double-sided tape inside. With Symbian near dead chances are that my next phone will have a touchscreen, which makes me wonder if many touchscreen phones offer that kind of repairability.

[1] The so-called "Select Enhancement" problem. See https://www.google.com/#hl=en&tbo=d&output=search....