Have you looked at a known good test image in Photoshop (with no adjustments) and on your phone. There are several reliable test images on color websites. That way you will get an indication of whether the problem is your PC monitor profile, the export or the phone.
Recent models of iPad, Android (such as Samsung) and iPhone have factory calibration which is pretty reliable, so they are quite consistent - of course brightness is user adjustable.
IF your main computer screen is correctly calibrated and profiled and if you save images with the sRGB ICC profile embedded they should reproduce well on an iOS or Android device. My iPhone X matches my calibrated Eizo Coloredge screen very well.