The number's validity is 90 days from the date/time of the last charged outgoing activity (Such as using data, sending an SMS/MMS, making a voice call, or recharging your balance).
If you wish to remove one of the numbers or your only number in the account which has a PayGo balance, contact customer care and they will be there to assist you with your request.
As for any available Main balance, it will remain valid in that account for 1 year from the date of removing the last number from the account, in case you wish to buy a new number and activate it in the same account to use this remaining Main Balance.
