If you’ve ever been in an area with low or no service, you’ve probably noticed your battery drops quickly. That’s because your iPhone is constantly scanning to locate and connect to a cell tower, and that consumes power.
Cellular data also uses more energy than Wi-Fi, since it has to transmit and receive signals over long distances and maintain connections with distant towers. In short, cellular connections can drain your battery, fast.
If you need to conserve power, switch to Wi-Fi, but be cautious on public networks.
How to use Wi-Fi over cellular on iPhone:
- Open Settings > Wi-Fi and toggle it on, and then join a known network.
- In Settings > Cellular, toggle off Cellular Data.
- Optional: In Settings > Cellular, disable Wi-Fi Assist to prevent auto-fallback to cellular.
