You could dip/dye the top half a separate color of your choice, this would blend in more and avoid the " can you fix this" comments. Perhaps have a tailor/dressmaker install vents at appropriate locations.
I agree with @Kitsambler. I ensure that I only use the smartphone privately and not let it's use distract or interrupt interactions with my fellow peregrinos. I keep it on vibrate only. I have been delighted with the combination of GPS, maps.me and Wikiloc. I also seek out local/regional music...
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