Huawei-approach is to place the SD-card into SIM2-slot making it either/or, but taking much less space from the guts of the phone. Nokia approach is to allow having all three cards in place at the same time. Funnily, Nokia has also both IMEI-codes in the tray. Not really sure why, but they are there.
I'm a known iPhone man, but Android has its benefits on the developer-side. Platform has much more open APIs for example to telecomms-side. Also when doing any web-development, running the new stuff from development workstation in an Android is easy via USB-cable. With a Mac, you can do the same with an iPhone. For proper testing, both need to be done.
While at it, I cleaned out my collection of various SIM-cards:
Not really needing expired and obsolete set of SIM-cards from USA, Australia, Finland, etc. To trash it goes.
Apparently this blog post was on a lighter side. No real message to convey, just couple of pics from SIM-cards.