I'm a reseller for a European bulk sms provider which several gateways into Nigeria.
I'll set up a test account for you with 5 free sms to test: if you like it, then you can pay in Naira into a GTBank account.

The sms delivers instantly and every time. Don't take my word for it, try it yourself. And if after exhausting your 5 sms you don't like it, no problem, no one feels obligated.

I have used several bulk-sms services myself and in the search for the 'perfect' one (if there's any such thing), I decided to contact the routers directly, hence I now find myself doing business This one works.

If you're interested, please send an email to info@smstrunk.com. For now registration is not automated and so I'll have to do it manually and confirm to your valid email address.

PS. In the event that you plan to purchase REAL BULK (I mean, as in "real bulk", then I might consider giving it to you for as low as N4.