@hamza, what do you mean? It's on the website, in the brochure, it's everywhere. Most networks say that your credit expires at the end of the month. With Vodafone, it expires after two months.

Also with Flexi you are automatically charged. That's one of the main points of Flexi. You don't need to top up and get charged.

Otherwise, you should join Red and you can control how much you spend. Red = Hala = Prepaid
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Mr. Q's Blog - A Qatari's view on Qatar.