Looking for 2 Factor Authentication solution for Android devices

We have a customer that is looking for 2 factor authentication on the device. They are currently using WM MC9190's with EAP/TLS with a user certificate. They are looking for a second level of Authentication prior to logging into the application (Wavelink Telnet).

 

We don't think there is a solution for WM devices, but there might be one for Android.

 

Any ideas?