I had bought Micromax X600 which is fully touch screen and there is no number keys at all. After working satisfactorily for five months, slowly its touch screen started un-responsive and after screen calibration its working was restoring. However, around three weeks back, its touch screen hanged off and never started. As a result, I had faced lot of problem, I surrendered it to its service center with guarantee card on 5th May, 2011. No touch screen is available was the reply of service center. It has still not been repaired and returned.
Meantime, contacted customer care. They too responded immediately. But still till date the phone is with service center only.
Now I am forced to call the service center daily only to hear that the phone is not ready and will be informed as & when it is ready.