Here's why the new mobile network security features aren’t available in the stable Android 15 update for Pixel phones.

You can make calls and receive texts on your Android phone using WiFi calling, even when you can't get a cell phone signal. Instead of using your carrier's cellular network, WiFi calls and texts ...

Wi-Fi can easily serve as a backup for your cellular network for calling and texting, especially if you find yourself without signal.

Step 2: Check the APN Settings for incorrect entries The notice “Mobile network not available” doesn’t necessarily mean there’s no available network to connect to.