My carrier is Straight Talk (using ATT network) and they require the user to enter the APN settings in order to access their data network. My Iphone 4s is factory unlocked but I can not get to the Cellular Data Network tab to enter the settings?
This iPhone was purchased where as factory unlocked?
If factory unlocked, the option to enter APN settings would be available.
What is preventing you from selecting Network on your iPhone at Settings > General > Network?