I have a Nokia mobile with a 2degrees sim card. I have pumped over $40 dollars in to it over the last two or three months. I only switched to two degrees within the last 4 to 5 months. I only ever use it in emergencies or when my girlfriend calls me. I send the odd text and even call the odd person for an average of 30 seconds to confirm something. This is only at most 3 times a month.
Yet, after a while, before I make a call I get a computer telling me I have less than 2 dollars credit. I look at my log online to find I had used less than $5 credit over the two months.
What makes it weird is. Two of the calls I made were under 30 seconds long and came up as "$0.00" the maximum being "$1.30" My text messages over the two months added up to something like 3 dollars.
Does my credit expire after a month? If so I was not aware.
I have just topped up again today. I will see what happens and post an update.