Plum advised Vodafone India on spectrum value for the 1800MHz band in the context of a consultation by the TRAI on reserve prices for a forthcoming auction of the 900MHz and 1800MHz bands. Plum reviewed the approaches considered by the TRAI and then estimated values using econometric analysis and network cost modelling. The results of Plum’s work were published as part of Vodafone’s submission to the regulator.