Any info would be appreciated.

Cell phones will work in the U.S. with certain services, and that would be the ones that use sim cards.I take mine to the U.S. when ever I go.

Cell phones will work in the U.S. with certain services, and that would be the ones that use sim cards.I take mine to the U.S. when ever I go.

Sadly the US systems vary a great deal from state to state.

GSM in USA operates on 1900 MHz. AT&T, Cingual? and one other

What that means here is you need to buy a Tri-Band phone. They are quite common. they will be 900/1800/1900 Mhz.

Best is to surf for GSM coverage/network in the city or cities you will be staying/living or visiting.

Hutch in Thailand uses CDMA which may be compatible with US CDMA someone else will have to answer that.

a cell/mobile GSM phone (3g-w/sim card) will work perfectly in the US as the phones are not locked, whereas most US purchased GSM phones are locked and unusable in other countries unless (unlocked).

there are a lot of new generation phones that will now work virtually around the globe. just make sure you buy a genuine authentic phone as there a tons of counterfeit phones in Thailand. avoid small no-name phone stands/stalls, do not buy any sim card on the

street or from a street peddler.

The other carrier is T-Mobile which I use. And I have bought several cell phones in BKK and when I get to the USA I take out the Thai Sim and put in the T-Mobile Sim. All is well.

GSM in USA operates on 1900 MHz. AT&T, Cingual? and one other

What that means here is you need to buy a Tri-Band phone. They are quite common. they will be 900/1800/1900 Mhz.

Best is to surf for GSM coverage/network in the city or cities you will be staying/living or visiting.

Hutch in Thailand uses CDMA which may be compatible with US CDMA someone else will have to answer that.