yah.. reinstall the firmware... seems like certain of their firmware got problem... before i reinstall the firmware it has (Chinese, English, Malay, Indonesian) language.. after flashing what i only got is (Filipino & English) language..
so i guess is the previous firmware got problem... Besides, before i reinstall the firmware , i had already tried hard format/reset the phone, but no luck..
Oh btw, my one is a Black E75 Too bad stupid Nokia decided to dropped off the Internet Call client from this phone (HEY.. this is a business phone, why stopping the technology going on??), while SIP setting function is still available (u still need to install 3rd party application to make internet call).

FYI, u can still make internet call by installing a official SIP VOIP application from Nokia forum, by doing this will enable back the internet call function in the E75, hence the setting will be a little hard for newbies.
http://www.forum.nokia.com/info/sw.nokia.c...2_0_en.sis.html
If your mail is connected via Wi-Fi, i don't think there will be any extra charges.. Unless u're connected via 3G or GPRS..
Is your dad oversea or you?? Why would u want to wait until end of the month only can receive the call from your dad?  Try make free internet call with your dad instead of waiting his call. 

p/s: check out my sig on how to make internet call.