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Ask HN: Why are SIM cards still a thing?

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Ask HN: Why are SIM cards still a thing?

#1
Using SIM cards in mobile phones seems antiquated. Should there not be a software solution that lets you select which network/s the phone should connect to?

Feels like this is probably the result of telco networks wanting as much friction as possible to change providers, but is there something more to it?

Re: Ask HN: Why are SIM cards still a thing?

#2
Because they handle private keys that is soldered to chip and can't be retrieved at all. Before sim cards there was something in the phones that can be easily reprogrammed and you always have to walk to your carrier office to "program" your phone. Swapping of sim cards is much easier.

Re: Ask HN: Why are SIM cards still a thing?

#3
At least one can change the SIM and can un-locked phones that dan be used all around the world and I can easily swap the SIM card. Why change it, it works great as intended and all software service solutions would mean a middle man is in the game - that would suck, right? (except you eant to be the middle man)

Re: Ask HN: Why are SIM cards still a thing?

#4
You know if that happen then flip phone users will have hard time because network will promote only high end selective phones. SIM card gives you freedom of putting it in $25 or $640 phone and it works just fine. People with security, budget and privacy concern go for flip phones. Just like net neutrality, phone neutrality is a good thing. One should never be forced to purchase smart phone if he does not want it. A dumb phone just works fine for calling and text messaging. I have never used internet on my phone and I will never be excited about it (3G 4G, 5G or anything). I carry my laptop everywhere I go and it serves my need well.

I must add you can find flip phones cheaper than cost of lightening cables.

Re: Ask HN: Why are SIM cards still a thing?

#5
Yes, security and flexibility.

1) Security: telco laws these days often require registration of accounts to your personal ID (i.e. no anonymous usage any more). How would a pure soft-SIM be able to fetch the data from the network?

2) Flexibility: SIM is pretty much standardized. This means a newcomer MVNO just has to issue SIM cards and the customer can use any kind of phone (or other interface, like a modem, a 2G/3G shield, ...) to use the network. And if a device breaks, then the SIM card usually stays intact and can be placed in a new device. Not sure how to securely do this with a soft-SIM.

Re: Ask HN: Why are SIM cards still a thing?

#6
The SIM card is a smart card, i.e. a secure piece of hardware, that protects the telephone network from the subscriber - most importantly, it ensures that the network has someone to bill.

In most western countries, SIMs do little else; however, they are full application platforms, allowing stuff like Kenya's mobile payment network https://en.wikipedia.org/wiki/M-Pesa.

For what it's worth, you really don't want to have every network provider negotiate with Samsung for the particular access policy of that network. "Not compatible with your telephone" indeed!

Re: Ask HN: Why are SIM cards still a thing?

#7
SIM card provides hardware-based, simple and secure authentication of subscribers to mobile network operators. Until manufacturers start to embed standardized secure element on all phones, alternative software based solutions (password, etc.) are more complicated and insecure.

Re: Ask HN: Why are SIM cards still a thing?

#8
If you have an iPad there is already a software solution: http://www.apple.com/ipad/apple-sim/

It contains what is known as a remote provisioning SIM: https://www.gsmaintelligence.com/research/?file=81d866ecda8b...

So clearly the only thing stopping the industry is the telcos who would very much like to make it as difficult as humanely possible for you to switch carriers. Especially in the US where there is a lot of competition and hence high churn.

Re: Ask HN: Why are SIM cards still a thing?

#9
There are some solutions out that are in software that are "eSIM" which allow devices to switch carriers through an OTA update.

Also see a company called SIMless.

There's a lot of market momentum around SIM cards and it keeps a telco's offering really sticky. It is more effort for people to swap hardware instead of software.

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