OriginalLucy: WiFi calling is carrier-specific, and while Fido is owned by Rogers, they are still separate carriers and receive different provisioning settings. If I switch to Fido, AT&T, Verizon, etc, I will likely be able to make WiFi calls. In fact, I might just pop in an active Fido SIM to quickly test this.
I went through my call logs, and Feb25 was my first Rogers WiFi Call sent or received, and April 24 was the last WiFi Call sent or received, meaning that the Rogers OTA firmware between Feb25 and Apr24 supported WiFi Calling. All of my updates have been exclusively over the air via Rogers.
I received the AAT498 firmware on January 29 or 30, and Rogers WiFi Calling definitely worked on AAT498, since I made and received WiFi Calls on Feb25.
I received the Mar AAV119 firmware on March 5 10:45am Eastern after a manual update check, and WiFi Calling still worked, receiving and sending.
I received the Apr AAW377 firmware on April 8 or 1-2 days after, and even with the WiFi problem that I reported the "fix" for at
https://forums.crackberry.com/blackb...aw377-1140393/, as long as I was connected to any WiFi (had to use 2.4GHz networks to stay connected), WiFi Calling still worked.
I received the ~400MB AAY819 firmware around May31, and this is when WiFi Calling stopped working. I received the 17MB ABA676 pre-Oreo maintenance update around June 14, and WiFi Calling is still not available.
*#837837# aka *#TESTER# shows BBB100-1, PRD-63116-005. Update paths at
https://tclota.birth-online.de/