Checkout the Idea Message Centre no. which allows free messaging in some areas. Just replace the below mentioned numbers with the old one on your phone. Don't Forget to backup or note down the old message centre no. on your phone.
Free Idea Message Centre no. :
+919891030080
+919844298443
+919847099996
Try all the three nos on your phone, see which one allows free messaging in your area. According to me, the first two nos were successful in Mumbai. The last no. proved successful in Kerala, Karnataka, Kolkata and Chennai.
Try in your areas and let me know if its working 4 your place by a comment.
