SIM cards & Apple
Funny thing, Apple first kills the usability of SIM cards:
- MiniSIMs are quite easy to handle, although there is a tendency that SIM cards get lost when they are not in the device.
- MicroSIMs are not so much fun, but one can usually handle them by handling them slowly and carefully. These are somehow understandable, as they DO provide some tiny volume economy over MiniSIMs, and they are roughly the same size as MicroSDHC cards.
- NanoSIMs are basically not changeable quickly on the road, you happen to need special tools and so on. The complexity of handling them stands in no relation to the volume savings.
Now, let's take a perspective:
An iPad 3 mini is 200x134.7x7.5mm == 202050 cubic mm.
A MiniSIM is 285 cubic mm, that's 0.14% of the volume.
A MicroSIM is 136.8 cubic mm, that's 0.07% of the volume.
A NanoSIM is 72.52 cubic mm, that's 0.04% of the volume.
So the designers have gained 1/1000th of the volume of the device in exchange for the primary purpose of the SIM, easy changing of the subscribe identity. (Changing a MiniSIM is something that can be done easily enough when driving. Changing a NanoSIM is an engineering task for home.)
Even for a small phone like the iPhone 5s, the volume saving from MiniSIM => NanoSIM are 1/250th of the volume.