Hi
Just to say that I have a syngery 1500 (bought from e-bay) My friend wanted to buy it from me but when she got it home the damm thing refused to ring. (had been working perfectly well beforehand). Tried re-setting to factory settings etc, but no luck. Have now taken out battery to see if what worked for your phone also works for mine. Fingers crossed and thanks for the information in your final post.