Where to find Low Data Mode in iPhone settings
Low Data Mode is a toggle in your iPhone's Cellular settings that tells apps to use less data when you are on a mobile network. To turn it on or off, open the Settings app, tap Cellular, then scroll down and tap Cellular Data Options. You will see Low Data Mode listed there with a switch next to it — tap the switch to turn it on (it will turn green) or off (it will turn white).
The setting appears only when you are connected to a cellular network, not when you are on Wi-Fi. If you do not see it, make sure you are in the Cellular menu and not the Wi-Fi menu. Some carriers or older iPhone models may not display this option, but it is available on iPhone 13 and newer, and on some iPhone 12 models.
Key Takeaways
- Low Data Mode is found in Settings > Cellular > Cellular Data Options and toggled with a single switch.
- When Low Data Mode is on, apps reduce background activity and video quality to use less data on your cellular plan.
- The setting only appears when you are using cellular data, not Wi-Fi.
- You can also enable Low Data Mode through the Control Center by long-pressing the Cellular icon if your iPhone supports it.
What Low Data Mode actually does
When Low Data Mode is on, your iPhone tells apps to cut back on data use. Mail stops fetching messages in the background, streaming apps lower video quality automatically, and iCloud stops uploading photos and videos until you are on Wi-Fi. Maps will load maps more slowly, and some app updates will pause.
Low Data Mode does not block data entirely — you can still browse, stream, and use apps normally. It just tells them to be more efficient. Some apps ignore the setting, so your data use will still depend on what you are doing. Watching a video will use more data than reading text, regardless of the setting.
Turning Low Data Mode on through Control Center
On newer iPhones, you can also reach Low Data Mode from Control Center without opening Settings. Swipe down from the top-right corner of your screen to open Control Center, then long-press (hold your finger on) the Cellular icon in the top-left area. A menu will appear showing your signal strength and Low Data Mode as a toggle.
This is faster than going through Settings if you turn Low Data Mode on and off often. The Control Center method works the same way as the Settings toggle — the switch turns green when it is on and white when it is off.
When to use Low Data Mode
Turn Low Data Mode on when you are near the end of your monthly data limit and want to avoid overage charges, or when your carrier is throttling your speed because you have used a lot of data. It is also useful when you are traveling internationally and using a local carrier with a small data allowance, or when you are in an area with spotty coverage and want your battery to last longer.
You do not need Low Data Mode on if you have an unlimited data plan and are not worried about speed. It will not make your phone faster or improve battery life significantly — its only job is to reduce data use. If you are on Wi-Fi, the setting has no effect because Wi-Fi data does not count against your cellular plan.
What happens if Low Data Mode does not work
If you turn Low Data Mode on and your data use does not seem to drop, the most common reason is that some apps do not respect the setting. Older apps and some third-party apps may ignore it completely. You can check which apps are using the most data by going to Settings > Cellular and scrolling down to see the list of apps and their data use.
If Low Data Mode is not appearing in your settings at all, restart your iPhone first. If it still does not show up, you may be on an older iPhone model that does not support it, or your carrier may not allow it. Contact your carrier if you think that is the case.
Low Data Mode and Wi-Fi calling
Low Data Mode only affects cellular data, not Wi-Fi. If you are connected to Wi-Fi, Low Data Mode is inactive and does not change how your apps behave. This means you can leave Low Data Mode on all the time if you want — it will only kick in when you switch to cellular.
If you use Wi-Fi calling (a feature that lets you make calls over Wi-Fi instead of cellular), Low Data Mode will not affect call quality. Wi-Fi calling uses very little data anyway, so the setting makes no practical difference to it.
Frequently Asked Questions
Does Low Data Mode slow down my internet speed?
No. Low Data Mode does not change your connection speed — it only tells apps to use less data. Your read and upload speeds stay the same. Apps may load slightly slower because they are not downloading as much in the background, but that is a side effect of using less data, not a speed reduction from the setting itself.
Will Low Data Mode prevent me from getting notifications?
Low Data Mode may delay notifications slightly because apps stop fetching data as often in the background. You will still receive messages and alerts, but they might arrive a few minutes later than usual. Critical notifications like calls and texts come through when ready regardless of the setting.
Can I turn Low Data Mode on for Wi-Fi only?
No. Low Data Mode only works on cellular networks. If you want to reduce data use on Wi-Fi, you would need to adjust settings in individual apps or limit what you do on that network. The iPhone setting itself has no Wi-Fi equivalent.
Does Low Data Mode use more battery?
Not significantly. Low Data Mode may save a small amount of battery because your phone is doing less background work, but the difference is usually too small to notice. If battery life is your main concern, use Low Power Mode instead, which is designed specifically to extend battery life.