@lordbanks, this is how it works:
There are 2 major traffic channels for SMS.
One is like a broadway....It is cheap and has many traffic. It is the one used for sending promotional messages, the regular bulkSMS you know
The second one has less traffic and it is more costly. It is not affected by DND, that is why Banks use it to send transactional bank alerts
So, if a bulkSMS provider has access to this 2nd SMS channel, it can send SMS to DND activated numbers, though the cost will be higher. As at date, there is less than 10 of such bulkSMS providers in Nigeria.
On eStoreSMS platform, you have the option to select the SMS channel tou want to use to send your SMS and you will get detailed delivery report for messages sent.
Disclosure: I am affiliated to eStore