yes, but it depends on what you mean by work. it will physically be able to work eg. call and text but im pretty sure the US sim cards will not work in UK's phones.
Depends what model you have. There are four different wavelengths used throughout the world. Check the specifications of your phone. If it is "quad band" it should work in any country.
Yes it will still work in the United Kingdom. There are cell phone towers located across the the entire world.
Yes mobile phones work in USA, in fact USA has the largest network of these wireless devices in the world.
no it has to be unlocked.
There is no such thing as a CDMA SIM card, since CDMA phones do not use SIM cards.
Not all cell phones are compatible with SIM cards. Some only work with a contract, and you need to unlock the phone before you can use a SIM card.
Cellphones usually have a SIM card. There are land lines that do not as well as Satellite phones also do not have SIM cards.
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
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.
Go phone sim cards only work with go phones; you'd have to unlock the matrix.
If the phones are from the same service provider then the sim cards will work in either phone. (i.e. Both phones were purchased from T-Mobile)
No they will not work with AT&T. AT&T uses a GSM network that requires SIM cards and Sprint uses CDMA that does not require SIM cards. The two networks are not even remotely compatible.
No. Cingular doesn't exist any more...
yea i have gotten several phones from att and used the same sim card for all of them, and kept the same phone number.
Yes, Virgin Mobile now uses the sim cards on new phones.
Yes