Two numbers on your iPhone

I bought four of the dual SIM adaptors and the sim cutter over at PhoneUnlockNow. Their service was magnificent. You can email the guy with any questions you may have and he'll answer you within fifteen minutes. The day my order was shipped, he sent me email and let me know that if I had any problems with installation, to give him a call. My order arrived within two days and was in an excellent packaging.
If you need to buy any of the dual sim adapters or the sim cutter, I suggest you get them from PhoneUnlockNow. They are extremely reliable and trust worthy.

I ordered 2 iPhone dual SIM cards from www.phoneunlocknow.com and they work great! The shipped them the same day I ordered them and have been helpful.

This article is really nonsens. It's completely incorrect:
- The iPhone does not provide any functionality for supporting dual SIMs.
- The support is in firmware which is in the SIM-adapter.
- Adding functionality to the phone by putting some extra software in the SIM is known and used for many years already by many providers; KPN in the Netherlands used it at least 10 years ago already.
- Which tool is used to unlock the iPhone is irrelevant; ZiPhone however is a great tool to do so.
- The are several providers of dual-sim cards; I used MagicSIM from quit a while in my previous phone which was Mobile5 based (sorry; yes I replaces it with an iPhone).

But anyway, the article puts some focus on the possibility to use two SIM cards in the iPhone which may not be known to many iPhone users (and potentially not even to many non-iPhone users). And that's a good thing to do. So anyway, thanks.

As far as wrecking SIMs go, you needn't worry if they are AT&T SIMs, since I stopped into an AT&T store and they say that making SIM cards for your phone is totally free.

My girlfriend has gone through about 5 cards. Does AT&T care? Not a whit.

If you store numbers on your SIM, however, then it's a bit dangerous. But knowing that you are doing something dangerous such as this, you already probably know the consequences.

I used to have dual number support on an old Nextel phone (pre Sprint merge). Great idea, terrible implementation. I (and I suspect most others interested in dual line support) want to have one device that handles my business and personal numbers:

1- configurable call waiting: if on line A (personal) enable CW for calls from line B (business) but not line A, if on line B disable CW from both lines.

2- ringer control: different rings for business & personal lines, as well as per contact rings. This probably requires mixing the two ringtones together. Also disable ringers separately. (business only, personal only, etc).

3- proper handling of voicemail: separate messages. Visual voicemail would be nice as long as I can distinguish which line a message came from.

4- dial out support for either line: contact manager remembers proper default line, but I can select the other.

IIRC, GSM networks can allow a single IMEI (device) to be associated with multiple IMSIs (SIMs) simultaneously, just most providers don't support it.

The Nextel dual line support pretty much sucked. One voicemail; ringers by contact but not by line; call out on either line, but its a pain to switch,; call waiting not supported. I'm curious how many business people would buy an iPhone on this feature alone.

"The neat thing about this method, however, is that Apple has apparently built dual SIM support into the iPhone OS."

I think it's called Sim Toolkit and it was there since the early stages of cell phones :-/

"The neat thing about this method, however, is that Apple has apparently built dual SIM support into the iPhone OS"

I think that double sim support is not a native iPhone feature. The "SIM application" menu show a list of items right from the SIM data, such as answering service or call forwarding enabler from the carrier.
When you insert a multiple-sim holder, it has a special switching command which is listed on the Sim application. It's not a iPhone or Ziphone feature.

I prefer TalkPlus. It doesn't involve hardware hacks, but it does support two (or more) phone numbers on the one iPhone. I really appreciate being able to ring out from my iPhone as if the call is emanating from my office... TP gets the CallerID right.

Quit plugging ziPhone. It wrecks bootloaders, wi-fi, and Bluetooth, and it's no wonder poor newbie iPhone owners keep using it to f*ck up their phones.

Use Pwnagetool, or, on a PC, iLiberty+ instead. You'll thank me when your iPhone continues to work.

Forgot to say...

I got a nice sim card cutter on eBay (other auction sites are available) that easily pops out the gold wafer.