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Hacking Telcel Recharging in Mexico

So I walked into a Telcel Mexico office and went through the 15 minute process of signing up. Great! Now I’ve got a SIM card and a phone number. This costs $150 Pesos and you get about $60 Pesos credit.

Next step is to add some money to it. You do that by buying prepaid cards for a certain value. You need to know the value of the package you want to buy first. In my case it was the 3GB of Internet for $399 Pesos. So I bought 2x$200 Peso cards (called “fichas”). They can’t apply these in the store or over the Internet, you have to call and apply them manually. The number is *333 and there are voice prompts in English to walk you through it. No problem, right?

Unless the service is down. For several days. Great, now you’ve got a couple of cards that are essentially worthless until somebody gets around to fixing the *333 service. That’s no fun. Internet to the rescue! There’s a way to bypass the system and enter the card codes directly! Here’s how to do it.

Enter *134*<CODE>#
Hit Call/Send

So if the code on the back of your card (what you just scratched off) is 1234 5678 90123 you will type: *134*1234567890123# and hit Call/Send.

Voila! You have now deposited the credit in your account. You can check that on your Mi Telcel account through the Internet. That’s also easy to sign up for, you give them your number and they send you a SMS with your temporary password.

To check your balance you can dial *133# but that seems to cost about $1 Peso each time, so use sparingly.

My biggest complaint is that the upload speeds are pretty low. Normally that wouldn’t have a big effect, but they’re so slow that it effectively means you can’t use data. 60 bytes per second is about my average upload speed. At that rate you make about one webpage request a minute and apps are all but unusable.

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