Hello @Sainimeg,
Welcome to the community!
What you are looking for is a Temporary Suspension, a few things to note.
A Temporary Suspension can only be done if you are not on a contract and can be added for 2-12 months at the beginning of your next billing cycle.
You will need to contact customer service to have the suspension applied providing you qualify.
To see the different methods of contacting customer service even from outside of the country see here.
