Upgrade time, How to sell Captivate?

factory reset on a rooted phone wont brick it. so i would do that, then plug it into a computer in mass storage mode and check to make sure there is nothing of yours left on it. it will remove all the apps but its just the best way to go. they can re download them anyway

 

I'd unlock it too, that's a really big plus to sell it with...

 

Isn't there an application to unlock the phone, like Galaxy S Unlock or something like that? I don't remember which one it was, but it worked. Not sure if the phone has to be rooted first, though...

 

Factory reset will not unroot your phone. There are seperate scripts that needed to be run to do that.
Android apps are attached to your gmail account. When you hard reset, all this info is erased from the phone. However, you can resign to another device, and redownload all these apps...they wil be listed under 'My apps' in the market. You can redownload even the paid ones.

The best way to unlock a GSM phone is to call the carrier.In this case it might not work, since you are not the original owner. ..Best of luck