We heard that T-Mobile USA was looking to dabble in the low-end arena with $50 unlimited voice plans, and sure enough, the carrier has gone live with 'em in the City by the Bay. In a surprise move aimed to rival similar plans from lesser known providers such as Boost Mobile, T-Mob is offering "loyal customers" the option to move to a $50 flat-rate calling plan. In order to get the offer, you must be located in San Francisco (for now, anyway), have been a subscriber in good standing for at least 22 months and want to save a few bucks on your mobile calling. It's stated that stores in the SF area are actively promoting the new plan, which should be fairly successful given that users won't have to extend their current contracts in order to switch. Toss in unlimited texting, data and Everlasting Gobstoppers, and we're sold.

[Image courtesy of Bicycle-Heaven]

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