Today we go everywhere with our phones and traveling without them is not an option. However, data roaming fees, excessive charges for texts and calls can lead to many people turning off their phone and leaving in in the room. Luckily there are ways to use your iPhone abroad for free. This requires no jailbreaking or unlocking iPhones. The key is to be flexible and to realize you may not always have access to texting, calling, and the internet at all times when traveling but you can get them all for free.
Facetime is an application that is already pre-installed in your Apple device. There is no need to download or open any new account. As soon as you get your iPhone, iPad or any Apple device, you are as good to go with Facetime. Facetime application was first introduced in iPhone 4 back in the year 2010. Back then, Facetime can only be used with a Wifi connection.
This app is guide to make a face time call without WiFi.
This is an unofficial Facetime app