Is there any way to know if a cellphone digital camera is automatically doing anti-aliasing filtering? Is there any way to have a control over it?
The best way to find out if a cell phone is using an anti-aliasing filter is to ask the manufacture.
There is no way to control it. The filter is a physical object, not a program. It sits in front of the sensor.
That being said, I would guess that there is no AA filter because of the small size of the pixels. But that's just a guess. Someone who knows for sure should be answering in the near future.