How to charge for short messages in different places?

Yes, that's true. In your case, all national texting is included in the SMS package. Short messages can be found all over the country, regardless of long-distance local calls or roaming. If you don't have it, it's a dime. In your case, it may be that your own bag does not include offline SMS. Maybe you sent an offline message, so you deducted money from the pre-existing balance, and online message deducted money from the SMS package. I suggest you switch to the latest M-Zone package when you go back, so that offline messages can be included in the SMS package without additional charges. Your province is as dark as ours, so you have to change to the latest M-Zone package to include offline SMS. I used to be in the same situation as you, hehe