T-Mobile $50 Per Month Unlimited Voice Plan now Nationwide

Earlier this month we reported that T-Mobile USA had introduced a $50 unlimited voice plan for T-Mobile customers in San Francisco.

Well, apparently the roll-out was a success because they have begun offering its $50 unlimited voice plan to loyal customers nationwide, less than two weeks after it began trialing the program in San Francisco.

Additionally, customers can add up to four lines to the plan for $40 per month per line, plus taxes.

There are some add-on features to the plan such as unlimited data for $25 per month, unlimited BlackBerry data for $35 per month and unlimited messaging for $10 per month that can be added to each line if customers choose to do so.

One important caveat to all of this: customers that want to sign up for the $50 per month unlimited calling plan and all of its add-on features must have been T-Mobile customers for at least 22 months.