Some smartphone users are experiencing significant Wi-Fi calling battery drain, a problem caused by a phone’s background processes when cellular service is weak or unavailable on both iPhone and Android devices.
Understanding Wi-Fi Calling Battery Drain
The feature is essential for users in areas with poor cellular reception. One user, Laura B, described her situation, “Living in a rural area with no cell service, naturally, my iPhone is used with Wi-Fi and Wi-Fi calling only.
It seems to me it uses more battery this way.”
This increased energy consumption is possible for several reasons. Even with Wi-Fi calling active, a phone may periodically scan for cell towers, while extra background processes and a constantly active Wi-Fi radio can use more power than a strong, stable LTE connection.
iPhone Uses More Battery with Wi-Fi Calling
On an iPhone, a weak or fluctuating Wi-Fi signal forces the device to work harder to maintain a connection, further draining the battery. This fundamental issue has not significantly changed with recent software updates, as the reasons for the power drain persist in iOS 26.
Android Users Face Similar Battery Issues
Android users on devices from Samsung, OnePlus, and others face similar challenges. The way different carriers handle Wi-Fi calling can affect energy use, and numerous apps running in the background can also contribute to faster battery drain when the feature is active.
How to Save Battery with Wi-Fi Calling on iOS
To mitigate the issue, iPhone users can enable Airplane Mode and then turn Wi-Fi back on. This action prevents the phone’s cellular radio from wasting power searching for a signal.
Additionally, new iOS 26 battery management tools offer detailed usage charts and a Low Power Mode to help conserve energy.
Managing Drain with Android Wi-Fi Calling Settings
Android users can apply the same Airplane Mode trick, manually re-enabling Wi-Fi to stop the search for mobile networks. Users can also check their carrier’s Wi-Fi calling preferences and use the Battery Usage settings to identify and restrict power-hungry background apps.
Many Android phones also include features like Adaptive Battery or Power Saving mode.
Improve Your Signal for Better Battery Life
An unstable connection is a primary cause of battery loss for both platforms. To reduce this drain, users should try to stay near their router or consider upgrading their home network to a mesh Wi-Fi system for a more consistent signal.
