What is the "reset" button?

[rakor]

Hey there

when opening the backcover you find in the upper left (seen from behind) a hole with a button in it with the description "reset".

What is this button for? What does it? I mean having the cover openend it is easier to pull the battery then finding some pencil to hit this button.

Does it have any further meaning than cuttung the main curcuit?

Thanks

[Subsentient]

I think it just hard reboots the phone. Nothing too interesting.