To keep your Vodafone (now Vi) mobile number active, you must maintain service validity. If your service validity expires, you may lose the ability to make outgoing calls, send SMS, or use data, and your number could eventually be deactivated.

"Recharge Successful! Your Vodafone (Vi) service validity has been extended till [New Date]. Thank you for choosing Vi."

Ideally used for reminders or quick text blasts.