Good 'ol T-Mobile is in a giving mood this holiday season. On Thursday, the carrier announced that it has eliminated the $18 handset upgrade fee for its customers. It applies to all cell phones and smartphones offered by carrier, including T-Mobile G1, and doesn't matter whether you're upgrading your handset in stores or online. To be clear, this is not part of a holiday promotion and there is no specified end date. T-Mobile said it's the company's way of thanking its loyal customers, and we say cheers to that.