The best part is that it looks like the testing is open to all, where users who are interested in helping Google test out the feature can sign up here and be notified when the feature is ready for them to test it out. This is the public beta of the WiFi calling feature which means that as expected of betas, there might be some bugs or kinks that have yet to be ironed out. It could also mean that what you see in the current build might not necessarily make it into the final build, something to take into consideration.
It’s probably also not necessarily the best idea to use it as a daily driver since betas can sometimes be a bit unreliable, but like we said, users who don’t mind taking a sneak peek and helping Google find bugs and test it out, you can go ahead and do so. According to Google, with WiFi calling enabled, users will be able to reduce roaming charges when overseas and can make calls from any device, not just their phone.
It is a welcome feature for users of Google Voice, but given that there are plenty of apps that already offer VoIP services, such as Skype, LINE, WhatsApp, Facebook Messenger, and even Google’s own Duo app, it seems like Google Voice is a bit late to the party.