i would like to ask that is it possible or any mobile GSM mobile phone
available in market in which we can use two different numbers of
different gsm network at a same time.both numbers should be enable to
make and receive calls at a time.

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Request for Question Clarification by hedgie-ga on 10 Jul 2004 19:36 PDT

By 'at a time'  you mean that phone would respond to any of the
two numbers calling, showing  'busy' for a call to the other number
while you are using fostst number. 
And calling either of two numbers, without replacing a SIM card
??
You are not thinking about having two coversations, 'at a time'
like in an conference call.
Right?

---

Request for Question Clarification by hedgie-ga on 10 Jul 2004 19:40 PDT

Would it be OK to use a laptop computer/mobil combinaion to achieve
the function?

---

Clarification of Question by rizwan1979-ga on 10 Jul 2004 23:41 PDT

most important thing is for me that both numbers shoudbe activated at
same time and i don`t want to use two numbers for confrence call.i try
to explain in this way that i have two numbers of two diffrent GSM
network .lifting two mobiles is burden for me and two numbers is
important for me and i cannot afford to off one number so i want
active both numbers in one mobile at a same time without replacing
simcard.

The answer is no , the simcard in the phone determines the number used
and right now there are no simcards available with dual numbers or
phones that could deal with such a setup

Have you thought about diverting the calls from one number to the other?

I believe vodaphone offer this facility here in the UK, so it might be
available where you are if they offer their services in your country.

There are a few companies that sell dual simcard phones. One of them
was Sagem a few years back, but I don't think they have it anymore.

You may want to check the following company that makes dual simcard
covers that allow you to put 2 simcards in a phone. They have a list
of phones that they support too. See
http://users.pandora.be/technimex/dualsimcard.htm The only trouble is
to activate one, you'll have to deactivate the other, in which case
switching the phone on and off.

Another vendor is http://www.kingtide.cn/mobile-phone-accessories/simcard-universal-simcard.asp
But the method of combining the simcards is quite crude, you have to
cut them into small pieces. But still, you can't have both networks at
the same time.

You can't have 2 networks switched on at the same time on a single
mobile phone. Because GSM employs a challenge-response mechanism to
authenticate your call. Any phone in the market does not have the
feature of holding dual-authentication services. It is beyond the GSM
Recommendation.

You can check the site www.roamware.com/. They are a US based telecom
software product company who recently won an award for their software
product installed between Hong Kong and China. It enables subscribers
of the GSM networks in Hong Kong and China to map two separate mobile
numbers of the different networks on one simple SIM card. Smart
solution, isn't it ??

IS THERE ANY GSM MOBILE AVAILABLE IN MARKET , IN WHICH I CAN USE TWO
SIM CARDS SIMULTANEOUSLY OF SAME OR DEIFFERENT OPERATORS.

IT CAN HAVE SWITCH OUTSIDE WHICH GIVE OPTION TO SELECT THE WHICH SIM (
PHONE NUMBER )U WANT TO USE AT PRESENT FOR INCOMING - OUTGOING.
THIS CAN HELP TO AVOID KEEPING TWO PHONES OR ALL THE TIME CHANGING THE
SIM IN A SINGLE FONE.

HJS.

Dear brother drhjs.
can you give me name of that compant or any website address of that
company which are making such kind of mobiles?

TO MY COLLEAGUE, I WILL GIVE U A ADRRESS 

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... Unikk GSM Hacking, Upgrading and Repair Philippines. ... I have a
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