To clarify, what I mean by "The difference here ATT actually will be charging $10 for each 50GB used." I mean to say "overage fee of $10 for every 50 GB after the regular monthly bandwidth allowance has been exceeded", ATT will actually be charging a fee when alot of broadband companies are listing bandwidth metering and mentioning a cap or limited service but some other companies such as Cox are not actually charging fee but rather providing usage monitoring and information even from one on one consultation to help reduce usage and also offering advice for a plan which would better cover person for their increased usage when or if it becomes intensive and beyond the scope of their current package's listed but not enforced monthly bandwidth allowance. Here's example what I mean:  What happens if I go over my monthly bandwidth allowed by Cox? Cox notifies customers if they exceed their bandwidth allowance -- and works with them proactively to resolve the problem. In some cases, customers do not even know they are exceeding the allowance because their computers are infected with a virus that is spewing spam or otherwise consuming bandwidth. In others, customers choose to reduce their bandwidth consumption or select a different Cox High Speed Internet package that better fits their needs. Will I be billed if I exceed these allowances? Cox does not currently charge you an additional fee if you exceed your allowance.   If you determine that your Internet bandwidth usage consistently increases, we recommend that you consider a Cox High Speed Internet package that more closely matches your use of the service.