Does WhatsApp Use Data? How Much Calls Use, at Home and Abroad

Taking WhatsApp on a trip? A HelloRoam eSIM for your destination gives it mobile data while your Canadian number stays on the phone, so chats, groups and calls carry on as usual.

WhatsApp uses mobile data or Wi-Fi, not your minutes or texts

WhatsApp needs an internet connection, through either mobile data or Wi-Fi. Its Help Center says it doesn't charge for messages, media, or voice and video calls, and that it stopped charging subscription fees in 2016. What you can pay for is the data, and that bill comes from your carrier.

Voice calls run on your phone's internet connection rather than your plan's minutes, WhatsApp says. So a WhatsApp call home from your trip uses no long-distance minutes: on Wi-Fi it runs over that network, and on mobile data it uses data like any other app.

Each person on a call uses their own connection. WhatsApp's video call guide asks both you and your contacts to have strong internet connections, so when you call someone back home, they spend their own data or Wi-Fi too.

WhatsApp call data per minute and per hour, from Meta's own figures

WhatsApp doesn't publish a data figure for its calls. Meta's engineers, though, have written about the bitrates their calling apps work with, and WhatsApp is one of those apps. Converted to megabytes, the rates look like this.

Each row is one direction of a one-to-one call, the kind Meta's 2024 video post measures. Your phone sends your side of the call and receives the other person's, so add the two together. In a group video call, Meta notes that each phone must decode several video streams, so yours takes in more than one person's video. The video rows count the picture alone: Meta says its video figures are the video's share only, with the call's sound, signalling and resent packets on top.

Calls adapt to your connection. Meta says its apps lower the bitrate as the network weakens, and it sees a lot of video calls running at just 50 kbps, or even under 25 kbps. Treat the HD row as a Wi-Fi figure: in the same 2024 post, Meta wrote that it disabled high bitrates on cellular connections, because people are highly sensitive to data use on their phones. Meta's newest figures, from June 2026, point lower. AV1, now on most phones in WhatsApp and Messenger, used at least 20% less bitrate than H.264 in Meta's offline tests on low-end and mid-range phones. On real-world networks, especially in emerging markets, video in Meta's calling apps typically runs at 10 to 400 kbps, up to about 180 MB an hour each way.

For a sense of scale, an hour-long video call at the top of Meta's mid-range band sends about 360 MB of video from your phone. If the other phone sends at the same rate, you receive about 360 MB more, so about 720 MB in all, before sound and overhead. To size a trip plan around your own calls, our data usage calculator adds video calls to maps, social media and the rest of your day.

WhatsApp videos can reach 100 MB, and backups can run on mobile data

Media files can be large. By default, WhatsApp caps a video you send at 100 MB and 720p on a faster connection, or 64 MB and 480p on a slower one, and documents can be up to 2 GB. Photos and videos are usually compressed when shared, and you can pick Standard quality or HD quality before you tap send.

Downloads count too. With media auto-download on, the photos, voice messages, videos and documents you choose download by themselves over the connections you've picked, so a lively group chat pulls in every clip whether or not you open it.

Backups are the quiet one. On Android, WhatsApp's chat backup has a Back up using cellular switch that allows backups away from Wi-Fi. WhatsApp warns that backup files vary in size and might use mobile data, and suggests Wi-Fi before you back up to your Google Account.

WhatsApp gives no size for a single text message. To see what your own chats use, check the counters below.

Your phone and the app both show how much data WhatsApp uses

1. In WhatsApp on iPhone, tap the Settings tab, then Storage and data, then Network usage. On Android, tap More options (the three dots), then Settings, Storage and data and Network usage.
2. On iPhone, open Settings and tap Cellular, then scroll to the list of apps and tap Show All if WhatsApp isn't there. The figure under WhatsApp is the cellular data it has used, as Apple's cellular data settings guide explains.
3. On a Google Pixel, open Settings, tap Network & internet, then SIMs, then App data usage. Each app's use sits below the graph.

To find your own per-call figure, reset the iPhone's counters before a trip (Reset Statistics sits at the bottom of the Cellular screen), make a 10-minute WhatsApp call on mobile data at home, then read WhatsApp's line again. Google notes that some carriers measure usage differently, and Apple says your carrier has the most accurate count, so treat your phone's figure as a guide.

Settings that cut WhatsApp's data use before you travel

• Use less data for calls. In WhatsApp, go to Settings, then Storage and data, and turn it on (on Android, start from More options). WhatsApp also suggests making and answering calls on Wi-Fi to save data.
• Media auto-download. On iPhone, open Settings, then Storage and data, and set each type of media to Wi-Fi, which WhatsApp suggests if your data plan is limited. On Android, the same screen has separate lists for mobile data, Wi-Fi and roaming, and WhatsApp warns that auto-download while roaming can add a lot to your provider's charges.
• Backups over cellular. On Android, go to WhatsApp Settings, then Chats, then Chat backup, and turn off Back up using cellular while you're away.
• Phone-wide data savers. On iPhone, Low Data Mode sits under Settings, then Cellular, then Cellular Data Options, then Data Mode on a 5G plan (on a Dual SIM iPhone, tap the number first), and it generally turns off Background App Refresh and automatic backups. A Pixel's Data Saver, under Network & internet, gives most apps background data on Wi-Fi only. Google notes that some apps won't work as expected without background data, so add WhatsApp under Unrestricted data if you need its calls to come through.

WhatsApp abroad on a Canadian plan can start a daily roaming fee

Abroad, WhatsApp uses the same internet connection as your browser and email. WhatsApp's guide to data roaming charges says data charges might apply while you roam and may differ from what you pay at home, so check with your provider.

With Bell's Roam Better on your line, one message can be enough. Roam Better is an add-on that, once on your account, covers every later trip. Bell charges its Roam Better daily fee on any day you make or answer a call, send a text message, use Apple Live Voicemail, or when data is sent or received in a Roam Better destination. As of October 2026, its Roam Better FAQ lists $13 a day in the U.S. and $16 a day in its other Roam Better destinations, with at most 20 daily fees per line in a billing period for the U.S., and 20 for the rest. So with data roaming on for your Bell line, a single WhatsApp message arriving in the background can start that day's fee. An active Bell Travel Pass replaces that daily fee while it lasts.

Rogers warns about the same trap from the other side: settings such as background app refresh, cloud-based backups and push email can use data and lead to roaming charges, even when you mean to stay on Wi-Fi. Other providers set their own rules, so read yours before you go.

Staying on Wi-Fi only works if mobile data really is off. With no travel data plan, WhatsApp's own advice is to turn off mobile data, data roaming, and media auto-download over cellular and roaming. Airplane mode does the same job: Rogers notes that it stops every mobile connection while you can still use Wi-Fi.

If you'd rather not plan your days around café Wi-Fi, our page on travel eSIM versus carrier roaming compares the two for Canadians.

A travel eSIM keeps WhatsApp on your Canadian number

WhatsApp isn't tied to the SIM that carries its data. Its Help Center says you can keep using WhatsApp with your home number while a local SIM handles your connection abroad. The one catch: if WhatsApp asks you to verify your number again, the matching SIM must be in your phone with phone or SMS service on, so keep your Canadian SIM or eSIM installed with its line turned on. Our eSIM vs physical SIM guide explains how the two kinds of SIM work side by side.

HelloRoam plans are data only and add no new phone number, so the eSIM sits beside your Canadian line instead of replacing it. The setup takes four steps.

1. Before you leave, confirm your phone takes an eSIM and is unlocked.
2. At home on Wi-Fi, install the eSIM with our setup guide for iPhone and Android.
3. When you land, turn on the travel line and switch data roaming on for it. If your phone has a separate roaming switch for each line, leave it off on your Canadian line. If it has one switch for both lines, leave it on and make the eSIM your mobile data line.
4. On iPhone, choose the travel line under Settings, then Cellular, then Cellular Data, and leave Allow Cellular Data Switching off so data doesn't drift to your Canadian plan. On a Pixel, set the eSIM as the SIM your phone uses for data.

Calls and texts on your Canadian number still go through your carrier. With Roam Better, answering a call, sending a text or using Apple Live Voicemail starts Bell's fee for that day, so call back on WhatsApp instead. On an iPhone, you can switch Live Voicemail off under Settings, then Apps, then Phone, before you fly. If the travel line won't connect when you land, HelloRoam's support team answers 24/7 on WhatsApp and by email, so airport Wi-Fi is enough to reach us.

We read every rule and figure in this guide on October 27, 2026, on WhatsApp's Help Center, Meta's engineering blog, Apple and Google support pages, Bell's and Rogers' roaming pages, and our own plan pages. Roaming terms move: Bell withdrew its Data Travel Passes on March 19, 2026 and pay-per-use data roaming on May 1, 2026, so check your carrier's current page before you go.