Earlier I was receiving SMS of the tasks prior to half an hour to my mobile. Now I am not receiving the sms. Please look into the matter and do needful.
Please log into your account at https://todoist.com click on the gear icon in the top-right corner, go to Settings -> Reminders, edit your phone number and you will see a drop-down menu called "Number to send from". Choose each of the three numbers listed here and then use the"Send a test" option through each.
If none of them work - send your full phone number to firstname.lastname@example.org we'll perform a test and, if necessary, contact our SMS provider about it.