We are witnesses to the gradual transition from SIM cards to microSIM cards. Possibly, SIM cards will still be further shrunk down. However, beyond size, I envisage that the SIM of the future will be significantly different in how it works too.
As at today, each SIM is locked to a specific mobile network. In mobile number portability, we observe that it is possible for a SIM that is programmed to a specific network to be migrated to another network. Pushing this idea further along its logical path, we can envisage something of the SIM of the future.
Imagine for a moment SIM cards that are non-operator specific, but that scan for available networks from which you can pick a network of your choice and then load airtime to use that network – very much the way Wifi works now. Yet; your SIM number does not change.
Since the subscriber’s unique identifier does not change, I would imagine that the issues of identity and security are pretty much taken care of.
Imagine the competition to provide better QoS, as on the whim of the moment, a subscriber can switch from network A to B and lose nothing.
Imagine the convenience of having just one SIM and never being stranded – if your everyday network does not cover an area you are travelling to, simply lock on to an alternative network and you are good to go.
I call this the smartSIM. Imagine the possibilities.