Starting from 14 November 2015, the international roaming (both calls and data) which occurs during the personal trip will be responsible by the staff.
To deactivate the roaming service in order to avoid the charges occurred, please dial *129*1#call. However, you can still use WIFI where it is available.
If you wish the apply the AIS roaming package, please let us know and we will send you the invoice once the billing comes.
Should you have further inquiries, please feel free to ask me.