Alcatel c820a with prepaid t-mobile card

to connect to the internet you must activate the GPRS first from your network provider ...The best thing you can do is to contact the customer care of your network provider and ask for the activation of GPRS ...
they will tell you the procedure to activate it ....
they will tell the number to which the message to be sent to recieve the settings ....
so note that down and then follow the procedures told by them ...
you will receive the gprs settings(profile) also ... make sure of the charges with them there will be many plans & then get activated ...
after this you will able to connect to internet ....
if the customer people tell you that your handset is not compatible for the receiving of the profile settings then you must tell them to give the manual settings(includes ip address,APN,etc) so that you can only create the profile and input the information given by the customer care people...

any further doubts reply me
i am always here to assist you ..
thank you
bye...