Cheap simple way to decorate a phone case?

[Saracen]

What can I use to mark my black phone case? My phone now looks a lot like my husband's, and knowing him he WILL keep going off with it by mistake! This is what I have. It's slightly textured. https://www.ebay.co.uk/itm/127983355155

I usually carry it in my jeans pocket, so I expect it will rub off over time. That's okay, as long as I don't have to redo it more often than every few months.

Some sort of paint? I did think of just writing my initials on it with Tippex 😁but I don't have any in, so I thought I might as well buy something which might be more effective and maybe even attractive.

I’ve put a big reflective sticker on mine for exactly this reason. One of these. Makes it easier to find in a black bag too. I already had the stickers.

You could do something with coloured carpet tape or insulating tape.

Oh, I like both of those ideas! Actually I might encourage HIM to use a reflective sticker while I put coloured tape on mine. He is very prone to losing his phone!

Thank you both!