The first decision for Canada is not how much data. It is whether you should be buying a Canada plan at all.
Canada alone, or North America
A great many Canada trips also touch the United States — Vancouver and Seattle, Toronto and Niagara from the US side, Montreal and Vermont, a drive across the border for a day.
- Canada only: buy the Canada plan.
- Canada and the US in one trip: look for a North America or USA–Canada plan before buying two separate ones. It is usually cheaper, and it means no gap in data at the moment you cross, which is exactly when you want a map.
- Adding Mexico: some North America plans include Mexico and some do not. Read the coverage list rather than the plan name.
As with the US, Canadian plans cost more than Asian ones. That follows the wholesale price the Canadian operators charge, and it is not something a reseller adjusts — everyone buys in at a similar level.
Where coverage stops, and it really does stop
Rogers, Bell and Telus cover the populated south, which is a narrow band along the US border where almost all Canadians live. Outside that band, Canada is one of the emptiest places on earth for mobile signal.
- The Trans-Canada Highway: mostly covered, with genuine gaps — northern Ontario between Sault Ste. Marie and Thunder Bay is the stretch people remember.
- The Rockies: Banff and Jasper townsites are fine. The Icefields Parkway between them has long dead stretches, and so do most trailheads.
- National parks generally: assume no signal away from the visitor centre.
- Yukon, Northwest Territories, Nunavut, northern Quebec and Labrador: coverage exists in towns and essentially nowhere between them. The Dempster and the road to Tuktoyaktuk are offline roads.
- Cape Breton and the Cabot Trail, Newfoundland's outports: patchy.
If your trip involves a long drive, offline maps are not a precaution, they are the plan. Download the whole province, not the next hundred kilometres.
Winter is a connectivity problem too
Cold flattens a phone battery fast, and a dead phone has no coverage at all regardless of what you paid. If you are driving in winter, carry a power bank and keep the phone warm in an inside pocket rather than on the dashboard mount.
How much data
- City sightseeing, maps, messaging: 2 GB a day is comfortable.
- Road trip with constant navigation and route research: 3 GB a day. Live navigation uses less than people think, but looking up the next town's motels adds up.
- Tethering a laptop, uploading video: 5 GB a day or more.
Hotel and café Wi-Fi is widespread in Canadian cities, which pulls real usage down. Where a plan slows after its high-speed allowance, maps and messaging keep working while video gets unpleasant — aim to stay above that point rather than relying on what happens after.
No Canadian number
Data only, no Canadian line. The places it bites:
- Car hire, hotels and tour operators phone rather than email, particularly outside the cities. Give them a number you can genuinely receive on, or your hotel's.
- Some booking and parking apps want a North American mobile number at signup.
- Roadside assistance: know that 911 works from any phone on any network, with or without a plan, as long as there is a signal at all. Where there is no signal, nothing works — which is the real reason to tell someone your route before a long drive in the north.