For Telkomsel customers, as follow:
New customers:
Type: REG<space>NIK#KK Number# send to 4444
Example: REG 1234567890123456#3201060401130027#
Existing customers:
Type: ULANG<space>NIK#KK Number# send to 4444
Example: ULANG 1234567890123456#3201060401130027#