Export Contacts From Nokia N900 to Acer Liquid A1 Android 2.2

This can be an awful things to get an Android phone be able to import all of our contacts on another devices, except you want to buy a non-free software. This is a step-by-step procedure that I did to get my Android has the same contacts with my Nokia N900:

Export all contacts on Nokia N900 using phonebook app.
As the result, there will be numerous .vcf files, means it separated per contact.
Open N900 terminal app and cwd to the exported contacts directory
Inside the directory that contains the exported contacts, run this command

$ cat ./* >> mycontacts.vcf

those command will merge down the contacts into a single file named mycontacts.vcf. The next command will prevent the ‘read failed message’ that appears if we import directly the mycontacts.vcf file above, this command will add an empty line between each contact.

$ sed -i 's/VCARDBEGIN/VCARD
BEGIN/g' mycontacts.vcf

Copy mycontacts.vcf into Android sdcard
Import using the Android contacts app
Done