gUDP

gUDP is shorthand for 'Grandfathered Unlimited Data Plan', and more specifically refers to Verizon's legacy postpaid smartphone unlimited data plans.

These plans were taken off the market in 2011, but continue to be grandfathered in for existing customers. They are not subject to throttling or network management, and are truly unlimited including hotspot usage.

We used to just call the plan Verizon UDP (unlimited data plans), but had to add the 'g' when Verizon brought back multiple versions of unlimited plans (with limits) starting in 2017.