How to purchase Roaming Pass via *800*3#?

BEFORE DEPARTURE:
Make sure you turn off Data Roaming or Cellular Data/Mobile Data on your mobile phone
UPON ARRIVAL:
Step
1
Dial *800*3#
Step
2
Select Roaming Pass from the menu list and confirm your purchase
Step
3
You'll receive a confirmation SMS to notify you of a successful Roaming Pass purchase
Step
4
Manually select the specified/applicable network operator
Step
5
Turn on Data Roaming or Cellular Data/Mobile Data on your mobile phone