How do I redirect iPhones if travelling abroad.

Hi Everyone,

 

So we would like to redirect iPhones to use the local F5 based on what country they are in. If the iPhone travels then we would like it to use the local country F5.

 

This is for iPhones using 3G/4G only. NOT Internal Company Wifi.

 

How can I do this? I've heard that the mobile network providers assign internal IP Addresses and you always get the same country IP Address regardless of what country you're in.

 

Thanks