It DOES NOT work on my unlocked S9+ with Metro PCS. There is an app that will let you control the feature (which is hidden on unlocked Galaxys) but even after enabling it, I am not able to make any calls or send/receive any texts. S U C K S !!! An unlocked phone should have more, not less features. The only reason I bought it unlocked is because Metro PCS does not offer the 9+ ALL OF THIS IS SO LAME I CAN BARELY TAKE IT!!!!
I just got a S9+ my carrier is MetroPCS (should be POS), not only NO WIFI calling but I got the Dual SIM . Ihave service for another line but Metro says, one sim per device, system not setup for 2 services on one phone. Talk about wasting money! Beware!!
My S9+ unblocked from Best Buy on Sprint has WiFi calling It is a hard to find setting. I got to it by going to the Phone button and hitting the 3dots on the top right of the screen. Press the Settings tab. The WiFi calling button is the last one on that page just above About Phone.
yesterday, I spent more than an hour with the ATT tech rep. he could not even eprovision my line to have WIFI calling because it was matched (IMEI) to the samsung S9+. meaning, my unlocked S(+ will not support ATT wifi calling. this same phone supported T-Mobile wifi calling all the time. not supporting wifi calling means we cannot take advantage with the new android messages and send regular messages on wifi
It is controlled by the carrier and metro pcs does not allow this feature I switched to Xfinity mobile and they finally enabled it on their galaxy phones but it is up to the carrier to enable this feature one of the reasons I switched to Xfinity
I have been struggling with this and thought people might benefit from my experience.
I got an "unlocked" S10 (meaning directly from Samsung.com and non branded) and I was with At&t carrier.
I tried and wasted so much time talking to different At&t and Samsung people and there is simply no solution to activate the WiFi calling.
I went to T-mobile and the minute they put their sim card in WiFi calling was up and running.
It is sad that you have to switch carriers for this but if you have no service at work like me, WiFi calling is essential.
Hope this helps.