T-Mobile just announced that Samsung’s Android-based tablet computer, the Galaxy Tab, will be available in T-Mobile stores on November 10.

After Verizon and Sprint, T-Mobile is the third major U.S. carrier to reveal the launch date for the Galaxy Tab, and — unless AT&T spoils it for them — T-Mobile customers will get the chance to buy the device one day before Verizon customers and four days before Sprint customers.

In the announcement, T-Mobile mentions its fast HSPA+ mobile broadband network, which should go hand-in-hand with Galaxy Tab’s 3G chip, but it doesn’t mention the price. The mystery of Galaxy Tab is nearly solved, but until we hear from AT&T and learn the price for the device from T-Mobile, the puzzle won’t be complete.