Open Sans' Greek characters doesn't work on Android

Hello,

I just want to report that some of the Greek characters in Open Sans, the font Twenty Twelve uses, doesn’t work on Android’s native browser.

2 examples (screenshots):

Smartphone (Android 2.3.7)
Tablet (Android 4.0.3)

After disabling Open Sans, everything is displayed as it should:

Smartphone & Tablet

PS: In case that anyone is interested, Open Sans can be disabled by adding the following code in functions.php:

function remove_open_sans()
{
	wp_dequeue_style('twentytwelve-fonts');
}
add_action('wp_print_styles', 'remove_open_sans');