T-Mobile says its offer of free data for tablet owners is just that — free.

The wireless carrier launched its free data for life offer on Thursday. The service is limited to 200 megabytes of high-speed data a month, but is open to anyone with a cellular-capable tablet, even if it’s not a T-Mobile tablet.

But there was some confusion. A computer glitch resulted in some people being told that the service would actually cost $10 per month.

T-Mobile US Inc. Chief marketing Officer Mike Sievert says the problem has since been fixed.

He says T-Mobile’s idea is to get more people to try its data network in hopes that they will like it and eventually switch their cellular phone service over to the company or buy more data.

(AP)