Im Rahul Jain and its been 3 months since i have purchase bulk sms from GO. All of my sms got delivered and i am receiving 97% delivery & the undelivered are re-credited in my account on a regular basis. I'm using this service for inter-office communication and that's why i'm so sure about the delivery rates. I'm enjoying their services a lot. I will suggest you guys to try their services as i'm quite satisfied with them.