I just activated a Sprint Nexus S 4g on Ting yesterday. It is working fine for making calls and sending SMS. I would like to add the phone as one of the devices that rings when my existing Google voice number is called. However, I am unable to receive the verification message from Google Voice to add this phone without a clear explanation of the error.
In order to troubleshoot this (with help from Ting customer service), I have established that the phone is able to make phone calls to other phones (both Google Voice and non Google Voice); it is able to send and receive SMS from non Google voice numbers. When SMS are sent to Google voice numbers, they show up as "sent" on the phone, and show up in the billing section on the Ting website, but are not received by the Google voice number. When the opposite (SMS from Google voice to my nexus S) is tried, Google voice throws up an error that it is unable to send the message.
Any pointers to troubleshoot this situation are welcome. Thanks in advance.