Can I cancel the monthly SMS subscription of M-Zone mobile phone number?

Do you mean those text messages that you gave away when you handled the M-Zone, or the extra text message package?

If it's the first one, it can't be cancelled, because it's part of the M-Zone business and doesn't need to spend extra money. If it is the second type, you can go directly to the mobile hall to cancel, with your ID card. If you are not the owner, you need the ID cards of both the owner and the agent.