Sprint is applying an additional $10 per month data fee on new smart phones, starting Jan. 30.
Data consumption from smart phones is growing along with the availability of streaming audio and video services.
Competitor AT&T Inc. last year abandoned unlimited data plans in favor of limited, but cheaper dataplans.
Verizon Wireless is trying out a cheaper limited plan as well.
Sprint already applies the $10 data surcharge on smart phones that have "4G" capability for faster downloads.