"You will need to top-up at least once every 6 months otherwise your credit will expire and your account will be deactivated. If your credit does expire you will be notified by text message then your mobile may be disconnected.
Once you top up, your credit will last for 6 months."
The above text from Telecom's website is a bit confusing. If I topup $60 now but don't use it all in 6 months, I'd put another $10 on to keep the account alive... that part I understand. But does this mean what's left of my original $60 top-up I added 6 months ago will expire and be removed?