Wireless carriers are getting more creative when it comes to making happy, loyal customers. Today, Sprint’s prepaid brand Boost Mobile unveiled a new scheme that lowers a customer’s bill when they pay on time. The already generous unlimited plans start at $50, but could drop to as low as $35 a month over 18 months.
For every six on-time payments, a customer’s monthly cost will shrink by $5. Within 18 months, a customer could get its bill down to $35 a month, where it will remain. It also applies to the more expensive BlackBerry plans, which start at $60 and can drop to $45. The unlimited plans include nationwide talk, text, Web, e-mail, IM and calls to 411.
These new kinds of approaches are trying to create loyalty among subscribers without locking them into long-term contracts. Last month, U.S. Cellular rolled out a plan, similar to an airlines’ frequent flyer miles. It lets consumers earn points that can then be redeemed for early phone upgrades and other perks.

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