How to exclude country code?

Thanks for this great plugin! I just have a concern which how to exclude the country code of mobile number?

The case that when a user tried to place an order with their local mobile number (without the country code) and then I view the order details from the admin, I see the mobile number without country code, which is correct, and an SMS message should be sent to the user’s local mobile phone number to confirm their order.

The actual behavior that this plugin seems to prepend the country code to the mobile number before sending the message, which is not desired.

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