The operator didn't disclose how many devices it has sold, so it's not clear that this is evidence of overwhelming demand for the G1, the first phone to run Google's Android software.

The news follows reports last week that some customers trying to preorder a G1 were told there were none left. At the time, T-Mobile said there were still a limited number available.

T-Mobile now says it tripled the number of phones it had earmarked for presales of the G1 and that customers have ordered them all.

That doesn't mean people who want one are out of luck, however. People will be able to visit a store to buy a G1 in person when it launches. In addition, customers can still preorder a device through Oct. 21, but it may not arrive until a later, unspecified date.

At the announcement of the G1 two weeks ago, many analysts warned against expecting initial sales of the G1 to compare to initial sales of the iPhone. But if anticipation is as high as T-Mobile says it is, the phone could help the operator prevent customers from switching to AT&T to get Apple's iPhone, something one analyst group said has been happening.