Question about Samsung Behold Bypass Proxy and Iphone

I own a Samsung Behold at the moment. I use the Bypass Proxy, web address tmobilex.t35.com site to get free internet without Data. I currently have a family plan and text message no data plan. I pay around 75 dollars a month. I have t-Zones. I can access wap sites for free. I been wanting to get an iPhone really bad. However, I still have a contract with TMobile for another 2 years and I don't wanna go to ATT. I was thinking of getting an unlocked iPhone 3g. I was wondering if everything would stay the same. My family plan and my text message. I am new to this. I was also wondering if I can just type in tmobilex.t35.com into the Safari and will it allow me to connect to the internet without Data or do I have to configure other settings like with APN. There was one person that told me the bypass works on iPhone and other people have said to get internet, you need to get t-Zones for 5.99. I have already have t-Zones so just no data, so I am confused. Can someone please verify this information for me.

hows the proxy bypass on the iphone? works the same way as on the behold?

yes APN setting have to be set unless the original owner already did so..t-mobile APN is epc.tmobile.com which you would have to put in the Setting->General->Data->APN...
also even if you have tzones APN setting have to be set either way before you access internet, unless previous owner has it set since by default its not set! hope this helps

Source: owned an iphone for almost 2 yrs and i unlock them and jailbreak them and know them like the back of my hand, and have a few iphones i am fixing for friends along with the one i'm fixing to be used soon, and have behold as a back up phone

if u dont have unlimited txting then yes..or there is an app for sending txt's via wifi only