GSM coverage in Gaspésie, Canada

In the United States and Canada there are two different, and incompatible, cell phone technologies: GSM (which uses SIM cards) and CDMA (which does not). Both are being replaced by LTE (a SIM-card-based technology often marketed as "4G", although its adherence to the 4G standard is limited and thus its use of the term "4G" is controversial).

Without knowing your itinerary and more details about your phone and the plan it currently works with, it is impossible to know with certainty whether you would have the cell coverage you need in an area as isolated as the Gaspésie Peninsula -- but I think the safest and most likely guess is that your phone would not work there (likely not at all, and especially not on the Bell network).

If your goal is to know definitively whether your cell phone would work, I recommended that you call Bell Wireless and tell them that you are not a customer, but want to know if you will be able to roam on their network. Make sure that they understand you have a GSM phone. I think the answer will be no; if so ... ask if they know of any GSM-based cell service in Québec so that you can call that company and pose the same question. (If the initial representative doesn't know anything about this, you might ask if a supervisor would have more information.)

But alternately, if your goal is simply to have a working cell phone, I recommend a different strategy:

1. Call one or more establishments in Gaspésie that would be familiar with the needs of hikers and the areas where you intend to go (such as camping suppliers and hotels catering to backpackers); ask if there is any cell coverage in the places you intend to hike, and, if so, on what networks.
2. Purchase in Canada a temporary cell phone that works on this network. In the United States, these temporary phones are commonly sold at big box retailers (Target, WalMart, etc.) as well as grocery stores and drug stores. I suspect the same is true in Canada -- but you should ask the hotels or outfitters you contact to be certain (unless you already know or unless someone more familiar with the scene in Canada elects to share that information here).