Colin Snow
Many people have reported mysterious data usage on their phones while they sleep. Some users have woken up to messages saying they have used data in their sleep, despite having closed all apps and being connected to the internet via Wi-Fi. Some sources suggest that this could be due to automatic updates or apps that use mobile data when Wi-Fi connectivity is poor. Others suggest that it could be due to rogue apps creating traffic for fake ad views. To prevent this, some people have set up automations that turn off mobile data during certain hours, while others have turned off their Wi-Fi and data entirely before going to sleep.
| Characteristics | Values |
|---|---|
| Data usage when the phone is asleep | A few KB of data usage |
| Reason for data usage | Auto-download updates for apps, notifications, and some apps prefer using mobile data instead of WiFi |
| Solutions | Turn off mobile data, use flight mode, disable Wi-Fi Assist, turn off automatic updates, set up automation to turn off mobile data during specific hours, reboot phone, toggle airplane mode, use Low Data Mode, specify WiFi vs. cellular data for backup to the cloud and updates, disable video autoplay, automatic updates, and automatic downloads |
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Background updates and downloads
For example, iOS devices have features like iCloud Drive, which can use cellular data for updates and backups unless specified to use Wi-Fi only. Similarly, automatic app updates on iOS and Android devices can consume data, especially if set to update over cellular networks. To mitigate this, users can disable automatic updates or set their devices to update only when connected to Wi-Fi.
Email applications can also cause unexpected data usage. Emails with large attachments or media content can be downloaded in the background, using cellular data if Wi-Fi is unavailable or unstable. Additionally, some email providers offer data-saving features, such as downloading attachments only when needed or optimising image quality to reduce data consumption.
Another factor is the Wi-Fi Assist or Wi-Fi Optimisation feature found on iOS and Android devices. This feature aims to maintain a stable internet connection by switching to cellular data when the Wi-Fi connection is weak or unreliable. While helpful in maintaining connectivity, it can result in unexpected data usage, especially when the device is left unattended for extended periods, such as during sleep.
To address this, users can disable Wi-Fi Assist or set their devices to prefer Wi-Fi connections even when cellular data is available. Additionally, users can review their data usage patterns to identify apps or services consuming excessive data in the background and make necessary adjustments, such as limiting background activity or restricting data usage for specific apps.
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Wi-Fi Assist
While Wi-Fi Assist can be useful, especially when travelling, it can also lead to unexpected costs if you are not monitoring your data usage. For example, if you have a limited data plan, using Wi-Fi Assist can cause you to exceed your data limit and incur additional charges.
To avoid unexpected costs, it is recommended to disable Wi-Fi Assist if you are not travelling or if you are in an area with a strong and reliable Wi-Fi connection. Disabling Wi-Fi Assist is a simple process and can be done by following the steps outlined in the previous paragraph.
In conclusion, while Wi-Fi Assist can be a helpful feature for maintaining a stable internet connection, it is important to be mindful of the potential data usage implications. By understanding how Wi-Fi Assist works and managing it effectively, you can ensure a seamless online experience without unexpected charges.
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Rogue apps
To identify rogue apps on your device, you can use built-in tools or third-party apps. On iOS devices, go to Settings and select Mobile. Here, you can see the amount of data used and a list of apps that have consumed data. The apps using the most data will be at the top. For Android and iOS devices, an app called Glasswire is recommended. It has visual network monitoring functionality that shows data usage peaks and allows you to identify the apps responsible. It also has a bandwidth usage monitor that tracks daily, weekly, and monthly data usage.
To prevent rogue apps from being installed on your device, follow these best practices:
- Review app permissions before installation. Ensure that the permissions requested by an app are relevant to its function.
- Only install apps from official app stores (Play Store or Apple Store).
- Read app reviews carefully. Be cautious if an app has only five-star ratings with no written comments or if it has one-star ratings with negative comments mentioning "scam".
- Be wary of phishing scams and fraudulent social media pages promoting app downloads.
Additionally, consider implementing automation or custom settings to turn off mobile data during specific times, such as when your phone is in sleep mode or Do Not Disturb mode. This will help prevent unexpected data usage by rogue apps or other background processes.
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Notifications
If you want to reduce data usage, you can turn off notifications for certain apps. This will prevent them from running in the background and using data while the phone is sleeping. To do this, go to Settings > Notifications and select the apps you want to turn off. Additionally, you can put unused apps to sleep, which will prevent them from running in the background and using data altogether. This can be done by going to Settings > Battery and device care > Battery > Background usage limits and selecting the apps you want to put to sleep.
It's worth noting that some phones, like iPhones, may disable Wi-Fi when sleeping to save battery. In this case, the phone will revert to using cellular data, which can result in data usage. To check which apps are using data overnight, reset your data usage settings before going to bed and then check which apps consumed data in the morning.
If you want notifications to wake up your phone and be visible with the screen black, you may need to adjust your settings or app permissions. This can depend on the make and model of your phone, as well as the specific apps you are using.
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Hard reboot
A hard reboot is the process of restarting a device after its power has been completely switched off. This process restarts unresponsive devices and clears their Random-Access Memory (RAM). However, performing a hard reboot will result in the loss of any unsaved data. Therefore, it should only be used as a last resort when a device becomes completely unresponsive. In all other cases, a soft reboot is preferable as it lets the device save all your data before restarting.
To perform a hard reboot on a smartphone or tablet, you must press and hold the device's power button for 5-10 seconds. Each smartphone and tablet model has its own way of initiating a hard reboot, but it typically involves pressing the volume and power buttons together. For laptops, most will perform a hard reboot if the power button is pressed for 5-10 seconds. If this does not work, remove and reinsert the laptop's battery.
If you are experiencing unexpected data usage at night, performing a hard reboot may be a solution. Firstly, check your phone's data usage to identify which applications are using the most mobile data. If you notice data usage at night, it may be due to auto-updates for apps or apps accessing the internet instead of using WiFi. To prevent this, you can turn off your phone or turn off mobile data and WiFi before going to sleep. Alternatively, you can set up an automation that turns off mobile data during specific times, such as when you are usually asleep.
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Frequently asked questions
Your phone may use small amounts of data when it's sleeping due to background app activities, such as auto-downloading updates. To prevent this, you can turn off auto-updates and background app refresh settings.
To avoid data usage, make sure your phone is connected to Wi-Fi and not just cellular data. Some phones, like iPhones, may disconnect from Wi-Fi after entering sleep mode to save battery. Keeping your phone connected to power while sleeping can help maintain the Wi-Fi connection and reduce data usage.
You can reset your data usage in your phone settings before going to bed and then check which apps consumed data in the morning. This will help you identify which apps are using data in the background while your phone is sleeping.
Cellular carriers often bill data usage in summary form, bundling data usage together rather than charging small amounts each time you use data. The time stamp on your data usage may not always accurately reflect when the data was used, especially if it is only updated a few times a day.
