Customers who switch to Sprint from Verizon, AT&T and T-Mobile, will be offered half of what they pay for their existing plans, Sprint said today.

For example, customers switching from Verizon would choose from a separate rate card that has the same data allotments as Verizon, but at half the cost. And customers switching from AT&T or T-Mobile have to choose from a rate card specific to the carrier you're switching from.

The offer will not apply to all plans from its competitors, such as T-Mobile US Inc's unlimited data plan, the company said.

New customers can sign up between Nov. 20 and Jan. 7 for the new rates, which will remain valid until January 2018. Sprint is offering a 28-day trial period.

Last week, T-Mobile said it would give customers a new option to stream video from services including Netflix and Hulu on their mobile devices without having it count against their data plans.