Currently an iPhone 6, before that the 4S.
The 6 camera is much better, despite boasting the same 8MP. I only feel the need for my Canon 6D in poor light, for zoom, or for selective focus. Both iPhones have excelled at the single shot HDR which gives boosted dynamic range without the unrealistic look from Canon's in camera 3 shot HDR.
It has its limitations like all phone cameras, but within them the results are impressive. On occasions where more depth of field is required, I reach for it in preference to the heavy DSLR around my neck.