Why do my photos lose saturation when I save them from my email onto my iPhone?

This is a very weird situation it seems. I do photography as a side job, and for fun. I export all of my photos from photoshop in RGB color in 300. This is what's odd: I emailed the photos to my client and myself, and I went into the email and saved them to my phone. They looked very un-saturated. I uploaded the same photos that I sent in the email to my Facebook page, and saved those to my phone as well (SAME PICTURES) and side by side the emailed ones were less saturated. So I went on my laptop and saved the emailed pictures to my laptop and they look FINE? Why do my pictures only lose saturation when I'm saving them to my phone?

Not all LCD monitors are equal.

Some can be as much as 40 points off in a specific colour and others can just not have the colour saturation that some people expect after watching all the adverts for various products with LCD screens.

In the world of professional photography, we're constantly calibrating and profiling our computer monitors, both on our workstations and notebook computers. Unless we use calibrated and profiled monitors to make critical decisions during image processing, there's a high chance that the images that are printed from those image files will NOT match what we saw on the screen.

It seems that you are also running into the issue where Facebook automatically reduces the resolution of any photos posted there so that huge image files, ones with all that wonderful data that makes them look amazing, do not overwhelm the Facebook servers with terabytes of image files from just one or two prolific posters.

I know it seems easy just to email image files to clients, but in reality, unless those image files have been reduced to under 2 mb or less, only a very few can actually be sent to your client and a 2 mb image file is NOT going to have enough data to show off the quality and resolution of the original 10 mb images you are producing.

It is for this reason, that most of us who sell images to our clients, have a service like Smugmug or Zenfolio where we post full size images in galleries that our clients can browse to see them in their full resolution state and then make good choices when they order prints or buy rights to use those images in publications or websites.

For an in depth understanding on how to manage colour in your digital image workflow, see if you can find a book called CMYL 2.0 Rick McCleary. It helps photographers to understand what they need to do to give clients and publishers the quality photos they expect from a professional photographer.

If you do not want to delve that much into this issue, try watching one of the webinars presented by Xrite on the use of Xrite Colorchecker Passport (to produce custom white balance in the camera) and one of the Xrite display calibration tools, i1 or Colormunki. These webinars can speak to some of the ways you can assure good colour saturation, colour accurate and brilliant images in what you present to your clients

Hmm…

It sounds like you are saving the images with an embedded Adobe RGB profile. Convert the profile to sRGB instead, using your image editing software, or set the sRGB profile in your camera.

Adobe RGB images don't display properly in most web browsers, and especially not on phones. SRGB is the standard colour profile for use on the web.