I have an AT+T 8820 and am going to Croatia. I tried to enter a couple of my contacts numbers into my address book but couldn't enter the "+" sign. Do I need this or should I just wait till I get over there and change the smart dialing code to Croatia? Also, do I need to enter a number for my voicemail or will it work to hold the 1 key? Many thanks!

I enter the + sign in all my contacts for that very reason. I've had issues when it's not there. Not sure why you couldn't enter the + sign...

If you use Outlook, assign country codes there and it will automatically append and sync the + for you.