Sorry, but there is nothing yet known as a replacement for voice plan.

Perhaps your query is too complicated? For example there are alternatives to the following parts of your query:

voice (40)
plan (48)

Maybe some reasonable answers will be found next time you come.

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

Other search terms related to voice plan and their ratings are:

★★★★★ data plan
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Google Trends

Scale is based on the average worldwide traffic of voice plan in all years. Click on graph for more.
voice plan