Samsung Omnia on Alltel network

[hghlander]

Can anyone help me out? I have an i910 that I activated on the alltel network. Everything is working great, except that it won't connect to the net via #777. I have unlimited internet on my account, so that's not the problem. I'm assuming that it's just something in the settings. I even took it into the local alltel store, but the rep looked and told me that everything looked normal. He didn't know why I couldn't connect. I am going to try Verizon next and see if they can help, but thought someone here might have the solution. Thanks in advance for any help.