The Nokia Tune (Grand Valse). Based on the sheet music here:
http://en.wikipedia.org/wiki/Nokia_tune
Other versions I've seen are slightly off.
[ Tab from: http://www.guitaretab.com/m/misc/102666.html ]
[tab]
E E Q Q E E Q Q E E Q Q H.
E||--12--10--------------8--7--|------------7--5-------|-------5------------||
B||----------------------------|-----------------------|--5-----------------||
G||----------11----13----------|--7----9----------6----|--------------------||
D||----------------------------|-----------------------|--------------------||
A||----------------------------|-----------------------|--------------------||
E||----------------------------|-----------------------|--------------------||
Duration Legend
---------------
W - whole
H - half
Q - quarter
E - 8th
S - 16th
T - 32nd
X - 64th
. - note dotted
|-n-| - n-tuplets
[/tab]