by saving it in a folder
connect the data cable to the computer and copy all contacts from the folder which has it
An online data backup will save all of your files. This is true only if you actually save all of them beforehand. It is a good idea to save these on a regular basis.
Assuming you have a newer version of Android OS on your current phone, when you upgrade to a newer phone, all the apps you had previously downloaded will transfer to that new phone. You can also download apps that can backup the data that is in an app (saving it to your external SD), and after retrieving the apps into your new phone, you can restore the data that was backed up. If your phone is rooted, you can use backup apps which can mass backup all the data that you have.
If the phone is from the same carrier then yes, it is very simple. If you were to try and put, for example, a T-Mobile SIM into a Cingular phone or vice versa, you will need to "Unlock the phone" first.
No - if you re-set your phone - all personal data is erased.
Yes you can, depending on your phone. On my Samsung T809 you go to the phonebook and select Management, then select Copy all to phone and you're done. It will be different on other phones though.
It uses the battery upon number of charges. Don't leave your laptop out too much to save battery. Use your laptop saving key methods to save more battery.
It all depends on how much you plan on using internet on your phone or laptop. There are unlimited plans available for $30-$40 a month. There are also plans that you pay by the data that you use.
its just a place were you can save all your data sort of like a backup
Yes, you can see the data by going onto settings (it all depends what phone you have)
Check out dell.com it has all required information.
They all use DATA . If they really want to they could get all the information in your Phone .