To this and other similar responses...

I tried that when I had to trim my SIM to fit in the Jolla. An adapter did not help me when I tried to put that SIM back in the N900 where it originally came from. Contacts are in the right place but I suspect the tension is missing as the whole assembly is no longer a single piece of plastic. Now there is a third format and I should believe that it would work this time?

All this for an entirely arbitrary decision. A standard SIM fits in Xperia Mini but it does not fit in a phone more than double the size and needs to be cut to the "nano" size. Mind boggles.