[dazc]

I may just try the coloured rectangle idea, could be interesting if I am challenged - which has already happened once with the phone.

[jaclaz]

Not coloured, but handy (and both waterproof and shockproof, guaranteed, no batteries/charger) just in case:

https://en.wikipedia.org/wiki/NoPhone

https://www.kickstarter.com/projects/nophone-usa/the-new-and...

(I think the company went out of business recently, though)