To determine whether your US-Canada calling plan will work seamlessly in British Columbia, Canada, and Arizona, USA, you should check that your service provider supports roaming in the areas where you plan to use your phone. Some carriers provide seamless connectivity across multiple countries, including the US and Canada.

Check if your phone supports the networks used in these regions. The US and Canada typically use LTE and 3G standards, but there may be slight differences in frequency bands.

Make sure that roaming mode is activated on your device. Otherwise, it may not be able to connect to the network in other countries.

Check your plan's roaming rates. Some operators provide special rates for calls, messages and data abroad.

Make sure your SIM card supports roaming and is unlocked for use on other networks.

It is recommended that you contact your service provider for more specific information and advice. They can provide details on what services and tariffs are available for roaming in Canada and the US, and provide tips on how to configure your device for use in these regions.

Hi krlwright. It should work seamlessly, but the limits may vary depending on the plan and carrier. Do you have a specific plan in mind?