Well the APN's should be automatically downloaded as far as I know and I have never manually entered it in my country for the several SmartPhones I have used. But anyways try the "Sim Toolkit" built in app or your Cellular service menu(should be some Network shortcut number to see all your Network info for example my network number is: *#888#* - You need to enter this in Phone dialer (Obviously

)), and you should find some special number over their to install the APN's automatically. Well thats if your Network company offers it. Cheers hope this helps.