T-Mobile Wi‑Fi Calling lets you make calls and send texts over any Wi‑Fi network when cellular coverage is weak. This feature, not a separate “T‑Mobile WiFi” hotspot network, requires an active T‑Mobile account, a compatible device, Wi‑Fi internet access, and at least 2 Mbps upload and download speeds.
What is T-Mobile Wi-Fi calling?
T-Mobile Wi‑Fi Calling is a built‑in feature that routes your voice calls and text messages through a Wi‑Fi network instead of the cellular tower. It is designed to improve coverage indoors or in areas with a weak signal. To use it, you need an active T‑Mobile account, a device that supports T‑Mobile Wi‑Fi Calling, access to a Wi‑Fi network, and internet speeds of at least 2 Mbps both upload and download.
How to turn on T-Mobile Wi-Fi calling on iPhone
- Turn on Wi‑Fi and connect to a network. Use the T-Mobile WiFi Hotspot Locator tool on the website or app, the T-Mobile Coverage Map for WiFi hotspot availability, or make an in-person inquiry at a T-Mobile store for WiFi availability.
- Open Settings > Cellular > Wi‑Fi Calling.
- Tap Wi‑Fi Calling on This iPhone to enable the feature.
How to turn on T-Mobile Wi-Fi calling on Android
- Open Settings > Connections > Wi‑Fi Calling.
- Select Wi‑Fi Preferred to prioritize Wi‑Fi for calls and texts. You can also set your device to automatically connect to recognized T-Mobile WiFi hotspots and choose your call handover preference between WiFi and cellular networks.
Set up your E911 address for T-Mobile Wi-Fi calling
Before using Wi‑Fi Calling, you must have a valid E911 address on file with T‑Mobile. This address is used by emergency services to locate you if you dial 911 over Wi‑Fi. You can add or update your E911 address through your T‑Mobile account online or in the T‑Mobile app. After setup, make a test call to verify WiFi Calling functionality.
Troubleshooting T-Mobile Wi-Fi calling issues
If Wi‑Fi Calling is not working, check that your internet speed is at least 2 Mbps upload and download. Slower connections can cause dropped calls or poor audio. Also confirm that your device supports T‑Mobile Wi‑Fi Calling and that your account is active. Authentication problems may occur if you recently changed devices or SIM cards. Signal interference from range or obstructions can disrupt connectivity. Network congestion may require adjusting your location or trying off-peak hours. Install device software updates to fix compatibility issues. For persistent issues, contact T‑Mobile customer support.
Frequently Asked Questions
How do I turn on Wi-Fi calling on my T-Mobile device?
On iPhone, go to Settings > Cellular > Wi‑Fi Calling > Wi‑Fi Calling on This iPhone. On Android, go to Settings > Connections > Wi‑Fi Calling > Wi‑Fi Preferred. You must be connected to a Wi‑Fi network first.
Can I use Wi-Fi calling internationally with T-Mobile?
Yes. When connected to Wi‑Fi, you can make and receive calls and texts to the U.S. and from the U.S. without international roaming charges. Calls to international numbers may still incur standard rates.
Do I need to download a separate app to use T-Mobile Wi-Fi calling?
No. T‑Mobile Wi‑Fi Calling is built into your device’s settings. No extra app or cost is required, and calls and texts are treated the same as cellular usage, including your plan’s hotspot data allowances.
What are the requirements for using T-Mobile Wi-Fi calling?
A valid E911 address must also be on file.
