Use a Scanner, Not Your Smartphone
For quickly sharing old print photos, maybe you snap an image with your smartphone and post it to Facebook. That’s fine in a pinch, but it’s not the way to get good quality photos that you can save for life and turn into other projects. You really need a scanner.
Specify the type of scan
If you’re scanning photos, you have a basic choice of color photo vs. black and white. Always scan in RGB color, even if the source photo is black & white.This is so we will have more manipulation options; we can easily change a color photo to black & white (grayscale), but not the other way around.
A good rule of thumb is to scan your photos at a minimum of 600dpi (Dots Per Inch) to assure decent quality for enhancement and restoration.