Updated TRAI regulation 2012
TRAI regulation has prescribed that a service provider must restrict the outgoing message of 200 count as maximum. This has been implemented in all service provider. So the SMS tariff has been changed in all service provider. This scheme has been implemented inorder to stop spam messages such as marketing which annoy your inbox for the whole day. So far there is no time restriction. You can send message at any time but only 200 message is possible per day.
Message booster packs in Tamilnadu 2012
Airtel message booster pack
Rs.26 - 80 sms/day with 26 days validity.
Rs.36 - 90 sms/day with 36 days validity.
Rs.49 - 40 sms/day with 90 days validity.
Rs.60 - 100 sms/day with 60 days validity.
Airtel message packs now seems to costlier than before. If you feel this packs is costly then you can deliberately move on to DOCOMO sms packs. Normal charges will be applied during festival days like Deepavali, Pongal and New Year.
Tata Docomo updated SMS tariff
LocalSMSPacks Rs:26 - 200 Local SMS FREE daily. Validity 30 days.
NationalSMSPack Rs:16 - 200 National / Local SMS FREE daily. Validity 15 days.
NationalSMSPack Rs:38 - 200 National / Local SMS FREE daily. Validity 45 days.
This packs were cheaper when compared to all other networks. Frequent Message senders can use this DOCOMO SMS pack which allows you to send 200 SMS per day. Other networks wont allow you to send 200 SMS per day at this cost.