These plans are only "unlimited" because nobody is using them as high bandwidth data channels.
Try to push high volumes through it, and expect to see SMS's delayed - SMS can be delayed for hours at the whim of the operator - or simply dropped, at the whim of the operator. Or simply rate limited.
Try to push high volumes through it, and expect to see SMS's delayed - SMS can be delayed for hours at the whim of the operator - or simply dropped, at the whim of the operator. Or simply rate limited.