O2 prepaid + € 5 starting balance

Yes, the delivery was fast and the balance was on 5. But then I have to realize very quickly that this card is of limited use and is deactivated when you are not using or charging. Wanted to use in an alarm system, because not constantly "phone" so that was not a solution. Next found that too interen SMS etc. take from the mailbox the same money from the bank, you have the card is not in operation and receives calls that goes quickly to zero with the money. Had then times angerufenob to the mailbox setting can change and - NO! No matter to draw conclusions from my point of view only the customer the money from his pocket. Another option is to also be "nice". Gets to someone and get the mailbox is allegedly also sent at the expense of the caller a text message! (Who really can now not sure that the mailbox does this ;-))