what did you do prior to the advent of 10-band GSM radios?
I'm in the US and I've almost always bought cheap unlocked phones and SIM cards, but until recently I've had to hunt around to get the right variant of a phone for my preferred provider. Eg. T-Mobile uses 1700/1900/2100Mhz, AT&T uses 700/850/1700/2300.
The latest iPhones and some other phones now have radios that cover all frequencies, but those radios are expensive and typically only come on phones that cost more than $700.
I'm in the US and I've almost always bought cheap unlocked phones and SIM cards, but until recently I've had to hunt around to get the right variant of a phone for my preferred provider. Eg. T-Mobile uses 1700/1900/2100Mhz, AT&T uses 700/850/1700/2300.
http://en.wikipedia.org/wiki/Cellular_frequencies#United_Sta...
The latest iPhones and some other phones now have radios that cover all frequencies, but those radios are expensive and typically only come on phones that cost more than $700.