please note that the RM30 is for 1 month period, YES will check you topup amount at the end of the month.
The amount that will be debited to your account is (30 - x), where x = the amount you have topup within the 30days period. if x more than RM30 then nothing will hapen.
for instance
you bought your GO package on 01/10/2011, the starter pack can last you for 2 months ie until 30/11/2011.
this is exceptional case as starter pack.
the day 1 start from 1/12/2011 to end of 31/12/2011,
if you did not topup any amount and assuming you have 0 balance left, then on 01/01/2012 you will see -RM30 in your account balance.
if your balance before end of the month is RM12, then you will see -RM18 (30-12) in your account.
if you have just topup RM10 during 01/12 to 31/12/2011,
if your account is 0 balance then YES will minus RM20 from your account.
if you have RM12 in your account before the end of the month, you will see -RM8 in your account (RM30-10-12=8)
If you have top up RM40 to your account, then YES will not do anything. the next day 1 will be from 01/01/2012.
I believe I have covered all the conditions.
(1) not topup at all with the month,
1.1 with 0 balance
1.2 with balance
(2) partial topup within the month
2.1 with zero balance
2.2 with balance
(3) excess topup, or VP68 or VP150
Hope this help and not making you more confuse.

so if i buy(renew) a VP via CC or MB2U direct debit on the last day of the VP, i am safe from any deduction fr YES rite?
and my existing balance will be roll-over and if i buy/renew on the next day my balances will be forfeited?