How to cancel M-Zone SMS monthly subscription

You can't cancel. The SMS package with mobile phone is one of its selling points, so you must choose one of the SMS packages to use. After all, this brand is aimed at the younger generation, customers with more text messages, or you can use Shenzhou.

If you don't use it for a few months, you can apply for downtime, so it seems that you only charge a few dollars a month for registration.