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« Happy new year, more blogs to come | Main | What to call the past decade? Has to be the Nokia decade, here's why »

January 04, 2010


Stefan Constantinescu

ever thought about how dual sim might become the default configuration when NFC turns big? much like today we carry only two things with us, our mobile phones and our wallet (i put my single house key inside my waller), why not have a phone that has a SIM card dedicated to all my voice/sms/data traffic and another dedicated to handling my transactions?

Tomi Ahonen

Hi Stefan

Hey, great comment yeah... Well most certainly a valid angle, and would arguably suggest it then needs 3 slots haha. I think that something like the South Korean super SIM is a solution, where it is 'programmable' with various identities, as if if was separate SIM cards, but within one casing. So they can do your phone network, and a couple of credit cards, and banking cards etc, all on one chip. I think that would be a bit more 'elegant' solution than 'wasting' haha another SIM slot for the identity info. But again, thinking about it, what if I have my banking info etc on one SIM card, and then switch phones, if that card has my banking, identity, electronic keys, etc, maybe those should be as a separate thing that we don't typically churn daily haha... How many of us have 11 houses or how many was it that Senator McCain had last year in the elections..

Good stuff as always, hoping 2010 is starting well for you Stefan. Cheers.

Your friend, Tomi :-)


Dual SIM phones are such a huge market in India.Samsung has sold so many Duos here. There have been dozens of new brands here selling dual sim phones and Nokia has indirectly created room for these brands to actually exist . With that they have also lost some loyal users . As you say they are late to the party.

But most of these users use the phone just for calling . They dont ever text much. So its fine with Smartphones not getting DualSIM facilty.

Getting back to the point? Why do I carry two phones on two diff carriers ? One for calls and one for data. Would i want to be able to do both on the same device ? - No . Reason - i will never trust a single phone and a single network being a businessman

I think DualSIM phones would never go main stream. They will become like a memory card slot or like the 3.5mm jack :)



I believe China Unicom were the first cell phone provider that sell dual sims with their contract.

Indonesia is another country that dual sims phone were being offered by celular provider. And the fist sim is lock to that provider whereas the second sim slot is open to any operator. That means, that in order to use 2 sim card, the operator that offering the dual sim phone will always be used. It better to have a business even it small then no business at all. If that user decide not to use that provider again, the phone can still be used but only 1 sim slot can be used.

Why Indonesian love dual sims phone and triple sim phone? It because we have 5 GSM/3G operator and 5 CDMA operator. And calling on net is cost almost nothing whereas to call off net will cost an arm and a leg.

For example, T-Sel, the biggest Indonesian network pricing, calling on net cost US$ 0.05+/call. while off net US$ 0.1/30sec. Smaller network provider have better price, for example, Axis on net rates were US$0.1 per day. After you spent US$ 0.1, your next call is free, where the off net is US$0.1/minute.

so, more than 70% of Indonesian have more than 2 sims card (not necessarily dual sim phone or 2 phones, most just using 1 phone and swapping between sims) because with 2 or more sim card, we can saves more money rather than just using 1 sims.

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Great article,
There are many European and Asian and Australian countries where people had almost two or more phones before some years but in 2010 Nokia proposed a dual Sim phones with less price so Dual Sim phones are so fabulous now because of their quality.A phones support double Sim.this is dual really nice post you have posted so i like this.keep it up

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