How to change the default or main mobile plan?
I have two mobile plans (let's say Plan 1 and Plan 2) and one internet plan (let's say Plan A) under my account. I found that all the upgrades or perks can only be applied to the first mobile plan (Plan 1). I believe the Plan 1 is my default plan. Could I switch the default plan to Plan 2? Or could I apply upgrades to my Plan 2?