Google is testing VoLTE calling services for Project Fi users

After providing ‘Wi-Fi Assistant’, an additional data-serving feature to all Nexus users as a part of Project Fi, Google is currently testing VoLTE calling, with a handful of the Project Fi subscribers.

In a Google forum post, Project Fi community manager Alena announced the report. Unlike traditional cellular networks, the calls placed over LTE will be higher quality and will also prevent cellular data from slowing down during calls as phones will remain on LTE networks instead of dropping down to HSPA.

Google notes that VoLTE "will not count against your monthly data usage."

“You can tell you’re making a VoLTE call because your signal indicator will continue to display LTE instead of falling to H (HSPA) when you make or receive a call,” wrote Alena.

Though some Nexus and Pixel phone are already showing the update, Google is yet to confirm when VoLTE will be enabled for all Project Fi subscribers.

For those who are unaware, Project Fi is Google's mobile virtual network operator (MVNO) that uses three of the five largest US networks - T-Mobile, Sprint and US Cellular. Switching the service between networks and WiFI, depending on the best coverage, it also connects to public hotspots to keep your data usage down. It provides a VPN to keep your data safe from the public hotspots.

Currently, Project Fi only works on the Nexus 6, Nexus 5X, Nexus 6P, Pixel and Pixel XL and costs $20 per month and $10 for every gigabyte of data.