We already have 4.4 updates in the works for both Mini and Max devices and you can track the progress on our software updates page. You should see this land as early as March for the Max and April for Mini.
According to them, you can expect the update to be rolled out to the HTC One Max in March while the One Mini in April. That’s all they have for us at the moment. So if you happen to own either of these devices, stay with us for more updates!
Source : Reddit