If I upgrade my iPhone 3Gs to the iPhone 4 am I able to keep my SMS messages?

I'm upgrading my iPhone 3Gs to the 4 and was wondering if I will be able to transfer those SMS messages to my new phone. Are they saved to my sim card? And are my contacts and other data able to be transferred to my new phone?

Why would you want to save a sms? Girls are so weird.
e-mail them to yourself.

your contacts can be transferred

When you get the newer iPhone, do a full backup of the old phone, then activate the new phone using the backup of the old phone and all will come over. I have texts from years ago from my 1st iPhone.

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