Surely you could make Voip calls on it. The device has a speaker, a microphone and data connectivity via Wifi or 3g/4g. You might look silly making calls on a camera but if you paired that with a Bluetooth adapter, then you'd be in business.
Galaxy Note 3 (N9005) - Unlocked Android 4.3
ASUS Transformer TF300T - Unlocked Android 4.2.1