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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Video streaming typically uses the most data on a smartphone, especially at high quality. As a 2022 reference estimate, Hong Kong’s Office of the Communications Authority (OFCA) puts one hour of high-quality streaming video at about 3 GB, compared with about 700 MB for standard-quality video and about 15 kB for an email without an attachment. These are illustrative estimates, not fixed rates for every app or phone. To find what uses the most data on your own device, check its per-app cellular usage.
How much data do common smartphone activities use?
OFCA’s 2022 estimates show why video can quickly outweigh lighter tasks. The figures are based on smartphone averages, and actual use can vary significantly by app, settings, and conditions.
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| Activity | OFCA estimate | What it means |
|---|---|---|
| One hour of standard-quality streaming video | About 700 MB | Illustrative estimate based on smartphone averages. |
| One hour of high-quality streaming video | About 3 GB | Illustrative estimate based on smartphone averages; more than four times OFCA’s standard-quality estimate. |
| One email without an attachment | About 15 kB | A small text email is a low-data comparison; attachments can change the amount. |
These are not guaranteed amounts per hour or per message. Video resolution, bitrate, encoding, viewing time, and how an app adapts to the network all affect consumption. OFCA also identifies downloads, music streaming, gaming, social-networking apps, maps, tethering, and automatic updates as possible cellular-data uses. OFCA’s data-use guide provides the source estimates.
Why video quality and viewing habits matter
Higher-quality video generally requires more data than standard-quality playback. OFCA’s estimates—about 3 GB versus about 700 MB per hour—illustrate a substantial difference, but they should not be treated as a universal ratio across streaming services.
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Actual use depends on several technical factors, including resolution, frame rate, codec, bitrate, the phone’s capabilities, the provider’s encoding, network performance, and whether playback quality adjusts to available capacity. Time spent watching and continuous or autoplay playback also affect the total. A per-hour estimate and your total over a billing period answer different questions.
Social video can dominate video traffic, but that is not a personal app ranking
Ericsson’s November 2025 analysis found that social-media-generated video accounted for 70–80% of mobile video traffic viewed on smartphones across four sampled European networks. Global video-on-demand (VOD) services accounted for less than 10% in that sample. Ericsson says its figures come from one week of collection; some traffic could not be classified, and the application mix may not represent absolute traffic shares. The percentages describe that sample, not every country, network, period, or individual’s phone.
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Traffic share is also different from data used per hour. Social video made up most smartphone video traffic in Ericsson’s sample, while professional VOD services delivered higher bitrates in its analysis. That does not establish that social video uses more data per hour than long-form streaming, nor does it show which app uses the most data on your phone. Ericsson Mobility Report, November 2025 describes the study and its qualifications.
How to find what is using up data on your phone
On iPhone or iPad
- Open Settings > Cellular (the label may vary by device, carrier, or software version).
- Review the per-app cellular data list to see which apps have used data during the displayed period.
- To prevent an app from using cellular data, turn cellular access off for that app. It can then use Wi-Fi instead.
- To begin tracking from a fresh point, reset the statistics on that screen and check them again later.
For the most accurate current-period total, Apple advises contacting your carrier, whose usage record can be more authoritative than the device’s counter. See Apple Support: Use cellular data on your iPhone or iPad (published September 14, 2026).
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Make sure you are comparing the right usage
- Check whether the activity used cellular data or Wi-Fi; Wi-Fi use does not count toward cellular use in the same way.
- Compare totals for the same tracking period. A high per-hour activity may not top the month if you rarely use it.
- Consider quality and time spent, especially for video playback.
How to reduce video data use
If video is at the top of your cellular list, the most direct options are to watch less video over cellular or choose lower playback quality when the app provides that control. The exact setting and menu path depend on the app; there is no single setting that applies to every streaming service. You can also turn off cellular access for a video-heavy app in iPhone or iPad settings if you want it to use Wi-Fi only.
For an Android phone, check the system’s app-level data-usage screen or your carrier’s app or account, since menu names and paths vary by device maker and software version. The sources here do not establish one current Android menu path for all phones.
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- 6L Max includes one year of KardiaCare: Membership is required to use this 6-lead EKG. You will be prompted to enter payment details when you create your account, but you will not be charged during the first year. Your membership renews after one year unless canceled.
- Board-Certified Cardiologist EKG Reviews - KardiaCare includes four free EKG reviews per year, available to use anytime during the year. Using your detailed 6-lead EKG results, cardiologists can detect over 20 arrhythmias, with results delivered in just 24 hours. Additional reviews can be purchased for $39 each
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When your own usage matters more than an estimate
Use reference figures to understand relative scale, not to diagnose your bill. Your phone’s app list can help identify likely heavy users, while the carrier can provide the most accurate current-period total. If measured use repeatedly exceeds a plan’s allowance, check the carrier’s plan terms and data record; OFCA notes that monthly plans may have fixed quotas and additional charges above them.
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