Ok had my sim almost 5 years and am currently on the 500 minutes free calls from favourite place tarriff.
Anyway Im running low on credit so was going to top up but its 10 days until the payment is due to get the free calls.
In the past (but not for over 3 years!) I topped up a few times a week earlier than the free texts ran out so didnt get them the next month as it had to be topped up at most 48 hours before.
So if I top up now I am worried I wont get the free calls next month.