An existing Loop Mobile subscriber can refer a friend or family member to purchase a new "Member Get Member" SIM card for Rs. 99 to get activated. The new subscriber provides the 14-digit unique code on their application form to the existing subscriber, who then SMS's it to a short code to link the accounts for free lifetime inter-calling. Alternatively, a new subscriber can purchase the SIM card, get the unique code, and provide it to their referring subscriber to also link the accounts for free lifetime inter-calling.