Your active data plan will always be used first whenever your data usage is covered by that plan. For example, if you have an active Local Data Plan (LDP) or Regional Data Plan (RDP) and are using data within the plan's coverage area, data will be deducted from the plan.
If your usage falls outside the coverage of your active plan, WalletRoam credit will automatically be used instead. This "Plans First" approach helps you maximize the value of your purchased data plans before using your WalletRoam balance.