Hello Lumangoy,
There are the usual things to check:
GV - Is the Chat Phone enabled?
OBi; Call History - Does the call show up as being recieved?
X_InboundCallRoute - does it still show "{ph}"?
I don't know whether you use the OBiTALK Portal or do your device management direct. If you need help finding the things above, let us know.
Seems strange to me, but I was helping another user the other night, who had not made any changes, yet after being away for the weekend, somehow settings changed. So, it does happen I guess.
Please check the settings above, and we can get you back up and running.
-G