how to change internal login? (Samsung i730)

[Ultima]

I`m use no Werizon Wireless
It`s my problem with connect to nternet
"Invalid login or pass"

we have login and the password of such:

Login: cdma
pass: cdma

My Samung send mydigitnumber@vzw3g.com

how to change login mydigitnumber@vzw3g.com to cdma?

Thank`s
(Sorry my bad english)

[Ultima]

Please help!