How long after a recharge expires or is used up before the account itself expires/is cancelled? Or to put it another way, what is the maximum amount of time before I have to recharge or lose my account?
To give you an example, I live overseas for months at a time. While away my prepaid mobile account is uncharged and "dormant". With my current prepaid account, it can remain this way for up to 6 months before the account is cancelled. In this way I have had the same telephone number for 8 years even though I am out of the country for a lot of that time.