Jio's 'monthly' recharge lasts only 28 days, not a full calendar month, making users pay 13 times a year instead of 12. This clever strategy quietly boosts Jio’s revenue and ARPU, while frustrating budget-conscious, rural, and senior users. After TRAI’s intervention, Jio launched true 30-day and calendar-month plans, but at higher prices, leaving transparency concerns unresolved.