send the number 1 by sms to the number 567 and you'll get the options below to choose from:
10 for internet access
11 for surf on 4
12 for surf on 7
13 for surf on 18
14 for surf on 1
you then reply back with say 11 and it will activate it for you.
to deactivate you reply back with the same number but with a 0 in front of it so in this case 011