Since you are an USEK student you can profit from the stduent plan subscription in ALFA or TOUCH.
In order to activate it you are required to have the following:
Alfa subscribers, will receive an SMS informing them to send AA+ followed by their ID by SMS to 1028.
Touch subscribers, should install and regularly check the touch mobile application on their phones; a “student plan” button will appear (in the application's main screen or under “touch news”), and they will be guided through the process.
In both cases, the client must have $5 in his balance for a successful enrollment.
✓ If you checked all the requirements listed above, then your stduent Id and phone number are sent to (ALFA or TOUCH).
You just need to wait a message from their behalf stating your elegibilty for the subscription, It might take a little while for unkown reasons.