To know if an iPhone has 4G and is using it, here are the steps to check and confirm:
- On the iPhone, go to Settings.
- Tap Cellular or Mobile.
- Make sure Cellular Data (or Mobile Data) is turned on.
- Tap Cellular Data Options (or Mobile Data Options).
- Here, check if Enable 4G (or LTE) is switched on.
- When 4G is available and active, you will see "4G" or "LTE" displayed near the signal bars on the iPhone's status bar at the top left of the screen.
- If the device is not on 4G, you might see 3G, E, or GPRS instead, which are slower data network icons.
Additionally, to be sure of 4G quality or presence, Wi-Fi should be turned off while checking and the network indicator should explicitly show 4G or LTE.
