I used SSH to connect to my phone and swap fonts manually. I renamed Helvetica.ttf to HelveticaOLD.ttf and then dropped in the new font whose name was ALSO Helvetica.ttf. However, the system font hasn't changed. I thought It may have not transferred correctly, so I did it again and it still didn't work. So just to be sure I downloaded the font to my desktop from my phone and it shows the correct font in the preview. What am I doing wrong?