Cellular Vs. Wi-Fi Calling: Which Is More Battery-Efficient?

Even if there are plenty of other ways to get in touch with someone, the good old-fashioned phone call is still a part of life. Whether you're catching up with family members, making a doctor's appointment, or yelling at a robot to connect you to an actual human representative, your connection is important for facilitating efficient communication. Nowadays, you can even use Wi-Fi to make calls on your smartphone, which offers an alternative to traditional cellular calling.

If you're looking for ways to improve your phone's battery life and make a lot of calls throughout the day, you may be wondering if cellular or Wi-Fi is more efficient. The short answer is Wi-Fi, which generally uses far less power than cellular data. That said, either will drain your battery faster if it has a weak connection. The better choice in practice will depend on your location and signal strength. For example, a person taking a call in a basement with a bad cell signal is going to use more power than usual, as will someone calling over weak Wi-Fi.

Even if it drains your battery faster, cellular is the better overall choice for phone calls than Wi-Fi for a very simple reason. When you make a call over Wi-Fi, you're competing for bandwidth with everyone else using the same network for streaming, downloading, and the like. That's also why public networks are often slow even at the airports with the fastest Wi-Fi. In contrast, cellular networks are made to prioritize calls over other data use, so the overall audio quality should be better than over Wi-Fi, where a call is treated like anything else.

Cellular is also vital for any calls you make on the go. These networks are designed to do what's called a handoff, where your connection shifts from one tower to another. 4G and 5G technology have made this transition seamless, meaning you can continue calls without disruption even while driving. Though Wi-Fi calling has its benefits, especially if you avoid common Wi-Fi mistakes everyone makes, cellular generally delivers better quality calls on a more consistent basis.