Yes, as long as you are using ATT/Cingular. I have switched my sim card from a Motorola to an Ericsson and now im using an LG.
the AT&T network, and the T-Mobile network both use SIM cards I know that Nextel and Sprint also use sim cards.
TM
Yes, i changed from Genie sim to £25 a month contact and i was allowed to keep my number
Cellcom in Wisconsin does not have sim cards, wish they did. I have heard that you can get a sim card from them but non of their phones have a spot for sim cards.
No
Yes SIM Card contains gold. 1000 SIM Cards = 1Gram Pure Gold
Cellphones usually have a SIM card. There are land lines that do not as well as Satellite phones also do not have SIM cards.
To find a phone with two sim cards in it, first decide what brand would be the chosen one. Then go the main website of that brand and order the phone. Sites such as Amazon and Ebay are also good places to purchase such items.
The plural form of SIM card is SIM cards.
the AT&T network, and the T-Mobile network both use SIM cards I know that Nextel and Sprint also use sim cards.
No Alltel uses CDMA and sim cards is GSM
yes they do all have sim cards also on a different note the t-mobile phones accepts the cingular sim cards when unlocked and vice versa