You can send pre approved transactional template SMS to your subscribers on dnd & non-dnd both.
Get the templates approved with fixed & variable fields only for system api generated sms which is under trai regulations.
Dear parent, your Son/Daughter is absent %% for %%. Please contact Class teacher. Dear student your fee due is %%%%% your fee due date is %%%% ABC school / college.
Dear customer your Ac %% has been debited by Rs.%% now your account balance is Rs.%% Thanks. Dear customer your credit card bill due Rs.%%% bill payment due date is %%%%%% thanks.
Dear %%,Booking has been Confirmed.Booking Tkt No~, Pnr-%%,AirLine-%%,Pax Name-%% Thanks. Dear customer your pnr %%%%%% has been confirm thanks.
dear %%%%% thanks for registering.your user name %%%% your password %%%%. dear %%%%% your activation code is %%%% thanks for registering.
Sender Id should be in block letter( Six Character).Note : Templates with special characters (i.e. #,@,&,<,>,?,:,",',^,*%% Enter command etc.) will not be approveand do not use any special character in any variable part of message content.