What's inside a Nokia 100?

I got myself one of these very cheap nokia 100 (about 30$) phones and wondered how it looks inside. The phone itself is made out of 100% plastic - but feels OK for this price:
running

Battery removed:
phone and battery

The good news is: Opening it does not require a special tool.
The bad news is: The phone is held together by plastic latches.
opening

Bummer: Nothing exciting - i didn't bother to remove the heatsink and the only interesting part (JTAG) was already accessible.
motherboard