PORT mobile no.ex:PORT 7837464908.after 1 
hour they call and request you to not leave there 
service and give 100 min or 500 mb  for 3month.when the 
min are finish then call cust care to deactivate 
all service.then on next day send msg again and 
enjoy free calling.

 

 
 
 
 
 
 
 
 
 
 

