Communication issues when traveling to Little Japan. Do I need to activate international roaming on my mobile phone?

The methods for using international roaming on mobile phones are:

Method 1: You can contact the operator to activate the international roaming service of the SIM card. You need to verify whether the local network frequency band matches the mobile phone. Turn on data roaming: Settings-Mobile network-Turn on data roaming (according to local network operator policies, excessive charges may be incurred after enabling).

Method 2: Some mobile phones support the Samsung Connect function. Enter the Samsung Connect store - select a package - purchase - pay. After arriving at the destination, enter Samsung Connect My Orders - select Activate.