yeah, ear piece problem is common to this model,
a disappointment indeed for a music phone..

the screen going blank when receive n making calls is not a problem though..
it is due to a sensor that make sure u didn't touch anything when receiving n making a call.
for instance when ppl call u, u don't wan to suddenly touch the cancel call or sumthing when u put ur ears on the screen

forgot to add..

do u happen to use a SP?
if u do then mybe the SP covers the sensor before u can even put ur ears on.
if not, then mybe sumthing else covering it that makes the sensor believes ur ears were on the phone n disable the screen.

if none of the above, i guess u better ask in the specific phone discussion under Nokia XpressMusic 5800 "TUBE" V4 coz more xperts there or sent ur tube to nearest NCC

This post has been edited by Fazz: Jan 14 2009, 03:15 PM