Airtel introduced a special Diwali offer -- 'Zero Side Effects' -- for Karnataka, Tamil Nadu, Andhra Pradesh and Kerala. Under this offer there is a zero entry cost on two months' advance rental applicable for new broadband and landline customers only.

The company has also waived off security deposit and registration, installation/activation charges. There is no monthly rental on telephone instrument and the modem. This offer is applicable to both residential as well as commercial customers, for plans starting from Rs. 499 upwards.