It’s long time question, bulk sms platform enable users to send unlimited messages in a day. No regulation for sms count to any operators. Even though users are advised to send limited numbers and limited sms count at a time. If it’s more than 1000 numbers in a single push the bounce ratio may be high.
So always try to send limited numbers in a single push at time. Transaction messages are real time but Promotion messages are not real time. It’s delivery possible only at day time. It’s screened by expert team before push to operators.
All message should have meaningful words. Regional language messages are possible through unicode platform.
