The best replacement for unlimited data is unlimited web.

The best alternatives to unlimited data are rated as following:
★★★★★  unlimited web
★★★★★  mobile share
★  shared everything
★  1gb
  email and web

Your alternative for unlimited data is not listed? Suggest!
Speaking about unlimited data, one probably shouldn't forget about verizon.

Other search terms related to unlimited data and their ratings are:

★★★★★ verizon
★★★ at&t
★★★ t mobile
★★★ hotspot
You have in mind a companion for unlimited data and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of unlimited data in all years. Click on graph for more.
unlimited data
unlimited web
mobile share