Use a text editor to open the VCF file. It should look like this: 

<pre>
BEGIN:VCARD<br>
VERSION:2.1<br>
FN:****FIRST NAME******<br>
N:******NAME*******;;;;<br>
TEL;VOICE;PREF:********NUMBER********<br>
END:VCARD
</pre>

**Replace** all stars with the data's name that I provided between them.

You may use ES File Explorer to open VCF file as text.