Quote from: dhobi on September 11, 2014, 12:54:54 PM
Can the new Hangouts app be set so that it does not allow calls over cell data, but only over wifi? Does anyone happen to know how much data is used per minute? I'm concerned about cell data use and whether a 3G connection (poor at times, thank you Sprint) can still be used for phone calls.
This is a function of your Android or iPhone's combination of mobile carrier and device manufacturer's configuration and customization, not of the Hangouts app.
The Hangouts app is just another app that uses data. It doesn't have a setting to control the access method to data. The phone determines which provider to use to carry that data (WiFi or 3G/4G). For example, my Sprint Android phone uses a feature in the Qualcomm hardware and firmware to give priority to WiFi. It periodically looks for previously-used WiFi access points and automatically switches over to them when able. So, you just need to do whatever is appropriate on your phone to manage your data connections. Be aware, as with any app that uses data, to not run into a nightmare scenario of using 3G data on international roaming for example. Put your phone into "airplane mode" with WiFi turned on, or disable mobile data, as appropriate for your location, WiFi availability/reliability, wireless data plan with your carrier, and phone brand and firmware.
It's probably too difficult to give an estimate of KB or MB used per interval, because it will depend on the CODEC in use. Hangouts supports multiple CODECs, and it will negotiate behind the scenes with the other end to pick the best one for call quality and available bandwidth.