At the current rates the major carriers are one-upping each other on double-data promotions, it’s basically become a race to see who can offer one terabyte first.

Sprint is now in the lead with its new double data promotion for businesses that tops out at a mind-boggling 800GB a month—across up to 100 lines—for $1,350.

Sprint’s latest deal will be on sale Oct. 10 through Oct. 31. As part of the offer Sprint is waiving the $15 access fee per line through the end of 2015 for customers who port over a number and activate a new Sprint device.

Compared with AT&T’s current double-data deal for businesses, which maxes out at $1500 for 400GB, Sprint’s top-line offer looks superior.

The latest business plan promotion from Sprint builds on a double-data offer already in place for plans ranging from 40-100GB (on special at 80-200GB).

Outside of businesses offerings, AT&T, Sprint and Verizon have been courting consumers with similarly inflated data buckets. 

First AT&T offered to double its 15GB, 20GB, 30GB, 40GB and 50GB plans—its 15GB plan offering 30GB for $130 through Oct. 31. Then Sprint jumped in and raised its 32GB, 40GB and 60GB buckets to 60GB, 80GB and 120GB, respectively, all at the same price. Finally Verizon joined the party and promised its 20GB, 30GB, 40GB, and 50GB plans would get twice the data—while bumping its 12GB plan up to 15GB and the 16GB plan up to 30GB—all for the same monthly fee.