@sumudu Only one. It can handle various widths, but not as wide as this beast. I have others but they're not wide enough either.
A good thing the Lumia 1520 is my spare/second phone: it's physically too big to fit in any of my various mobile phone brackets in the car. The law here says cellphones can only be used in a car if in a commercially available bracket/holder.
I'll go hunting for one tomorrow.
Carrier was supposed to transfer the service from the old micro-SIM to the new nano-SIM within four hours. I lodged the application at 12:32 pm today (Saturday). Their active hours on Saturdays are 9am to 6pm so there was plenty of time to do the job.
So I got the scissors ✂ out and cut the existing micro-SIM down to nano-SIM size. It's working, somewhat to my surprise.
@sumudu The thing is enormous. Six-inch screen, so it's really a phablet, however much I hate using that word. 20MP camera, 2.2 GHz quad-core processor, 2 GB RAM, huge battery. The price was right.
Another update for WP10, which in the main part, I prefer to WP 8.1. It's about halfway through the update.