[abdelkweli1]

Works amazingly well!!
If people do not want to install sticky apn: this is the method to "stick" your apn:
1. Open iphonebrowser (or connect using ftp)
2. Go to /System/Library/Frameworks/CoreTelephony.framework/Support/UnknownCarrier.plist
3. Save the file unknowncarrier.plist and open it thru notepad
4. Go to
<dict>
<key>apn</key>
<string>HERETYPEYOURAPN</string> For t-zones type wap.voicestream.com
<key>password</key>
[...]
</dict>
<dict>
<key>apn</key>
<string></string> Leave it blank
<key>password</key>
[...]
</dict>
5. Only change the first one not the second <dict> as specified above
6. back to iphonebrowser and replace unknowcarrier.plist with the one you just edited
6. You're good to go and you havent had to install yet another software (useful one tho)

Good luck