Dual Sim Cards

[Bizzy]

so mi browsin ebay fi somephones an mi come across couple weh have dual sim card that can work simultaneously.

Mi a try fi unnastan how dat go??

if mi put in mi tmobile and digicel chip what would happen?? if i go ja an tun on de fone, it wi automatically pick up an use the digicel?? an when mi come back a merca it pick up tmobile signal??

smaddy please learn mi [img]/forums/images/%%GRAEMLIN_URL%%/helpsmilie.gif[/img]

[Bizzy]

Re: Dual Sim Cards

wow! it seem like dis dhe bout long time...how mi jus a hear bout ie??

[img]/forums/images/%%GRAEMLIN_URL%%/nahtalktoyuh.gif[/img]

[Bizzy]

Re: Dual Sim Cards

Cheaper roaming: One phone but two numbers

By Eric SylversPublished: SUNDAY, OCTOBER 16, 2005

MILAN: Two cellphone numbers and only one phone: for many who tote around two phones, one for work and one for private use, that may sound too good to be true.

Though few people know it, there are two ways to get rid of that second phone while keeping two numbers. The first option is to buy a small device, called a dual SIM card adapter, that when inserted into the phone allows the handset to carry two SIM cards - and therefore two phone numbers - at the same time. The other option is to have a second number added to an existing SIM card through your carrier.

The type of dual SIM card adapter needed depends on the make and model of the phone and can cost15 to50, or $18 to $60. A SIM, short for subscriber identity module, is essentially a small piece of plastic with a computer chip in it that goes inside a GSM phone. The chip holds personalized information, including phone numbers and billing data.

The device, which is normally inserted between the battery and the rest of the phone's electronics, is made mostly in China and can be hard to find in Europe unless acquired online through companies that sell mobile phone accessories. They work only on GSM phones.

One reason the dual SIM card device is not widespread is that mobile phone operators do not want to share their clients with competitors. Giving customers the possibility to easily use two SIM cards opens the opportunity for them to have cards from different companies.

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"A lot of phones are locked to one operator, and that has been a hurdle to the take-up of this technology," said Jean-Louis Carrara, vice president of marketing and technical consulting for the North American operations of Gemplus, the largest maker of SIM cards. "Customer care was also a problem because once you start changing the inside of the phone, the manufacturer no longer guarantees it."

Shenzhen Singularity Industrial is China's largest producer of the device, according to Heming Zhu, the company's overseas manager.

"Outside of Asia, our biggest buyers are in Russia and Turkey, but we don't know who they then sell the products on to," Zhu said by telephone from China. "This product has great potential in Europe because many people there carry two phones. Our biggest buyers in Western Europe are in Germany, and there are some in Italy and England, but still very few in France."

Even with two SIM cards, though, you cannot simultaneously receive phone calls coming in to your two different phone numbers. To switch between the phone numbers, in most cases, the phone has to be shut off and turned back on. That makes the dual-SIM-card phone potentially appealing for somebody who travels in two countries and has local phone numbers in each place to save on roaming charges.

There are some phones that leave the factory ready to take two SIM cards, though they are not big sellers. Some Vodafone stores in Milan sell a Daewoo phone, the DX20, that costs79 and can hold two SIM cards. A store owner said that the phone accounted for less than 0.1 percent of his total phone sales.

Subscribing to two phone numbers for one SIM card from a single operator is another option. But that choice is also hard to come by, depending on the individual carrier. T-Mobile International offers the service in Germany, and Telecom Italia Mobile offers it in Italy.

Vodafone Group, which has operations in 27 countries, offers the service only in one country, Italy.

In most cases the two numbers on the same SIM card have to be from the same operator, but the advantage is that the phone can always receive calls directed at both numbers. One number is designated as the primary number, and that will be the one used for outgoing calls unless an access code is dialed before the phone number
source

[Pepper]

Re: Dual Sim Cards

Me know smaddy dat have dis. Well all me know is dat she have two diffrant numbah pon di one phone. She nevah call it dual sim card technology, but den again she not very advanced when it come on to tech terms.

She has had that for years. Through di walkie talkie people, who dem was again...before dem merge wid sprint.

She work for the federal govt and have a work cell phone, but government regulations prohibit her using the work phone for personal calls. So dem gi har dat phone and she have di two lines on di one phone.

[Bizzy]

Re: Dual Sim Cards

Yeh, but mi a unna stan dat dem have sim cards where ur carrier can give u 2 numbers...annuh dat one mia talk. de phone mi lookin at have 2 slots weh u can use 2 different phones for 2 different carriers... int'l even.

mi nuh waan 2 numba pon tmobile..bad enuh mi a plan fi lef dem as de contract up in 8 weeks [img]/forums/images/%%GRAEMLIN_URL%%/bannana_purple.gif[/img]