Sorry, I can't magically fix all the mobile device screens of the world so they will start displaying images in a gamma-correct way... The fact is, the owners of such devices will never see gamma correct images on their screens, at least until the manufacturers fix this. It sucks but I can't help there.

Anyway, I think you have bigger problems than gamma with those devices anyway (glare, reflections etc.), so that's probably the least of your concerns.