There is strong evidence that increasing FMC bundle take-up can reduce mobile churn
"Analysing the reported levels of mobile churn and the reported FMC bundle penetration shows that such bundles can reduce the levels of mobile churn."
Fixed–mobile convergence (FMC) plans are increasingly commonplace, and operators continue to launch such offers with the objective of reducing churn. Mobile churn is affected by multiple factors, and while FMC bundling does reduce mobile churn, it is not clear how effective it is in doing so. In this article, we evaluate the available evidence and provide conclusions on the efficacy of FMC at reducing mobile churn.