try this link.... (See Below)
AnswerYES !!! GSM Phones, CDMA Phones will work in India
Yes they do.
GSM phones will only work in Trinidad and Tobago if they have a SIM card available to use with it, especially for international phone calls.
Check out the link below
Unlocked GSM cell phones should work with any provider. You will be able to tell one the sim card is put in the phone.
There are two types of cell phone networks, GSM and CDMA. As long as the network you are trying to move your unlocked phone to is compatible then yes it will work. In most cases a GSM phone will not work on a CDMA network and vise versa, however, some careers (such as Verizon) have support signals for GSM phones. There is no support for CDMA phones on a GSM network at this time. So for overall versatility, GSM phones are better.
Unlocked phones are GSM phones that will work with any GSM carrier. A GSM phone works on AT& T, T-mobil and any other system that is GSM compatible. Most inetrnational cariers are GSM.
GSM is a cellular network and mobile phones connect to it by finding other GSM phone in the area. These phones are spread across 212 countries and territories and work whereever there is another GSM phone in the vicinity. The coverage area of each phone is also dependent on the cell size.
not now but when bell and telus become gsm carriers it will work. btw that's in November 2009
The short answer is no. Boost's newer iDEN phones do use a SIM card that can be used in GSM devices for international roaming but they will not work in GSM devices in the US. Most iDEN phones are not compatible with GSM networks, and GSM phones are not compatible with iDEN networks.
European GSM phones are great for travelers to use in foreign countries, especially since many US cell phones do not work overseas. GSM phones will generally welcome you to a new country when you cross their borders, and when traveling to a country in the European Union they will also provide the cost of phone calls made and received while in that country.
Samsung phones that can support GSM 850/1900/ 3G 1700/2100 are the ones that will work in America. Also, make sure that the phone is already unlocked so you can just insert any American GSM SIM cards.