There's no reason it can't work It's just that Apple is purposely stripping it out of your 4S support and regular 5 support so that you're more likely to upgrade/buy a new Apple device According to apple, only the 5C and above will get WiFi calling So I would say no, the 4s would not get WiFi calling WiFi calling is also available on the iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s and iPhone 6s Plus You'll need to check in with your wireless carrier to see if they support your older device To activate WiFi Calling on your iPhone Go to " Settings" and select " Phone " and choose " WiFi Calling " and then slide or tap " WiFi Calling on This iPhone " where the slider will turn green Do click " Enable " to complete the process Onscreen guidelines that follow should help you enter an address in USA which you
How To Use Wifi Calling On Your Iphone Techlicious
