Thread Contributor: Venvasion
A Teenager Got Himself Free Unlimited 4G Data
A school going kid from Virginia, United States was able to bypass the 4G LTE network of T-Mobile. As a part of his fun challenge, he used a prepaid sim and a spare phone to check whether he could use the internet without a data plan. After getting initial success, he went on to unlock the hidden gems in the T-Mobile network.

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T-Mobile pre-paid SIM cards are designed such that users can update their account and purchase additional service without having to go into a T-Mobile location or log onto their account from a wifi network. This is a handy feature, but there’s just one problem: what if the user’s coverage ends, and they want to purchase more? The device would have to still gain access to T-Mobile’s network so the purchase could go through.

So essentially these SIM cards allow phones to have access to the internet at all times, but this access is rigidly blocked, intended to allow users access only to their T-Mobile member portal unless they’ve paid for active service. But Jacob Ajit discovered that the popular Speedtest app still worked even though the device’s pre-paid period had expired.

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Jacob Ajit came to know that T-Mobile was simply allowing the folders named /speedtest. So, Jacob hosted some files on his page with a folder named /speedtest and he was able to watch all the videos that he uploaded without any active data plan. However, the young boy showed the problem that existed and contacted with T-Mobile to solve the problem. The solution, he says, is simple, and simply review their whitelist to disable this type of URLs.

Quote:The way he did it makes so much sense that we’re stunned nobody has figured this out before. – T-Mobile

Ajit admits that the thought that all software systems are vulnerable is “a bit scary,” but he seems confident that the liabilities will be removed sooner than later.
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Damn. That was a great find right there...

Now I wonder if Verizon has any flaws.
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