Following the lead of just about every other big US mobile operator, Alltel Wireless has come out with a $99-a-month unlimited voice plan, according to a report on FierceWireless.

The new plan, Freedom Unlimited, is separate from Alltel's MyCircle plans, which provide unlimited calling to a specific list of phone numbers for a flat monthly fee, starting at $49 a month for unlimited calls to five numbers and $59 for unlimited calls to 10 numbers. Why anyone would still sign up for MyCircle when they can now get a plan that lets them call as many numbers as they want for an extra $40 is a mystery to us, but Alltel chief marketing officer Frank O'Mara recently told FierceWireless that his company considers $50 a month the "sweet spot" for a wireless plan.

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