This is a mundane tale, but I'll tell it anyway..you haven't got anything better to do have you?
I have a Nokia, it takes a Nano size SIM card. My daughters contract was up for upgrade, she was happy with her phone though, so I thought, OK, I'll get her the contract and use the new phone (fancied trying going back to Android so I selected a Moto G)
Asked in the shop at the time 'Can it take my nano SIM?'
'Yes' he said 'but it needs this adaptor..' OK, done.
Home, fitted SIM in adaptor, fitted in phone, tried out, nice. Thought though that I could transfer over messages from old phone for sentimental reasons, tried to swap SIM back ...stuck..
SIM actually came out from under the adaptor, adaptor stayed in. Hmmm...stuck..
Put SIM back in old phone, had a bit of a go at stuck adaptor with tweezers...still no go.
Man thing, after trying to force it I finally decided to look at the instruction book, just in case there was a secret button I'd not seen... Read bit where it says 'To get phone ready, insert SIM like this. Use a Nano SIM only, DO NOT USE AN ADAPTOR'....
So it's a bit of me (Not reading instructions first..

) and more them (shouldn't have told me an adaptor was fine to use and sold me one to use in it when the book says not.)
There, that's three minutes of your life gone.