Want to made giant prints of your tiny phone photos? Instead of doing the enlargement purely with Photoshop, Photojojo suggests using a scanner for high-quality enlarging. Simply resample the small photo at 360dpi, print it out on high quality matte paper, and then re-digitize it using a scanner at 360dpi and the print size you want. It’d be interesting to see a side-by-side comparison of this technique versus simply resizing in Photoshop and printing that image directly.
DIY: Turn Phone Photos into Mural-Sized Prints! [Photojojo]