To turn off Low Data Mode on iOS 15, follow these steps:
1. Open the Settings app on your iPhone running iOS 15.
2. Scroll down and tap on "Cellular" or "Mobile Data," depending on your device's language settings.
3. Under the Cellular Data section, you'll find the option for Low Data Mode. Tap on it.
4. Toggle off the switch next to "Low Data Mode" to disable it.
By following these steps, you'll successfully turn off Low Data Mode on iOS 15.