Paytm — New user Promo code not working

Address:

Shimoga, Karnataka

In my name I have 4 SIMS(Vodafone). I was tried to registered those numbers in paytm, when I used free25 new user promo code.The promo code worked only for one number and rest of the numbers it wont worked. Then paytm application pop up warning message like only time per user. Please I need explanation regarding this issue.