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Card Adds Dual Sim Functionality To Any Phone

Gordon Kelly


Card Adds Dual Sim Functionality To Any Phone

Those ingenious chaps over at USBfever have done it again...

Following the iPhone 3G unlock, helpful USB cigarette lighter charger and clutter free portable charger, the Taiwanese company has come up with a potentially life enhancing breakthrough for many: the 'Digital Dual Sim', a product with the ability to make a handset work with two sim cards.

Better still, both sims will apparently be online simultaneously, automatically (thanks for the sad update kassam18) switch between numbers without the need to turn the phone on and off and lines can even be changed manually should the signal become weak on one or the other.

Sounds good, so how does it all work? Ok, it's scissor time. Yup, like many iPhone 3G unlocking solutions a bit of bravery is involved and owners will need to use the available template to cut their sims to a reduced size. They then insert into the sim shaped holder and go back into your phone. Job done. Handily, should you suffer a sudden change of mind or cancel one number, the kit comes with a pair of sim 'houses' which enable owners to put their cut sims inside to return to single sim functionality.

Caveats (naturally): the solution doesn't work with 3G (USIM) sim cards but otherwise claims to be "compatible with 99% of mobile phones" and V1, V2 and V3 sims. Still, the twitchy best check with USBfever first (and probably those with an original iPhone).

The Digital Dual Sim goes on sale immediately for just $11.99 (£6.84 - shipping: $2.99) so even the most credit crunched adventurer shouldn't be scared off. Let us know how you get on...

Update: Good news folks, a new iteration of the Digital Dual Sim is now compatible with 3G cards too. All cards shipped after 17 October will be receiving this upgraded edition. Thanks to Justin and TJ for the spot.


Product Page

Paul Nicolson

October 20, 2008, 5:23 am

I had a duel sim adapter about 5 years ago, these are nothing new, you just had to switch the phone on and off to swap sims.


October 20, 2008, 9:08 am

They do now Support GSM and 3G-USIM SIM Card (for order shipped after 17 Oct 2008).

Should work with any sim card


October 20, 2008, 12:11 pm

What is so annoying is that the standard SIM card and the carriers themselves, have the ability to support TWO SEPARATE phone numbers on a single SIM card.

Since the late 90's I had a 'Line Two' contract with Orange UK, for which I had a single phone handset containing a single SIM card. Pressing and holding the # key would toggle which line the phone would make outgoing calls on. Also, both lines were active for inbound calls all the time, so people could call me on either number, regardless of which outgoing line was currently set. Another benefit was that the second line cost me just &#1635 a month plus calls!

However, after 10 years or so Orange UK decided they didn't want to support this service any longer for obvious reasons... it's more lucrative for the handset manufacturers and the phone carriers to get you to use TWO handsets. That way they can charge you for two full contracts and sell you two devices.

So, the technology has been there for a long time but the profiteering attitude of the phone companies means we'll never see it again.

Lon Bailey

October 20, 2008, 12:43 pm

Do we have a report of anyone who actually managed this? Ditto for the previous "cut a notch out of your sim card" report - any successful reports?


October 20, 2008, 12:55 pm

@Justin - thanks for the update Justin, where did you see this?


October 20, 2008, 3:36 pm

how exactly do you manually change? is it done as a sim service or as software that may not run on all handsets?


October 20, 2008, 4:19 pm

Details on 3G support is on the features section on the product page:



October 20, 2008, 4:46 pm

Updated with credits :)


October 21, 2008, 1:52 pm

have to say... WOW!

I hate carrying 2 handsets with me all the time.. both are work mob and one is for receving one is for calling... i know it sounds complicated but there are far more things in the world are like this...lol

sadly my iphone 1g doesnt work with 3 and there is no unlock for 3g version.

Q: will this work with iphone 3g sim unlock?


October 26, 2008, 1:06 am

I would like to add that both numbers are NOT online at the same time. I bought this adapter from http://www.usbfever.com/ind... and it stated in the description "Both numbers are online simultaneously". I recieved the adapter they would only work one at a time however it just made it a little easy to switch without switching the phone off. I emailed them and they sent me this reply:

"For the description "Both numbers are online simultaneously", from my understanding, it means 2 numbers in 1 mobile, not mean to you can have 2 numbers using at the same time. Anyway, it seems the sentence leads people to think as what you think.

To make less misunderstading, we've removed the sentence and will check with technician and let's get back to you later.

Sorry for the inconvenience caused."

I have been on the website since and it has been removed. Total balls..


October 26, 2008, 2:11 am

@kassam18 - many thanks for the update. Not the news anyone would want to hear. I've updated the article.

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