No. There isn't an absolute reason. It's not straight forward to implement. And will be more buggy for a while. Also, there's rumors that carriers shut down th

No. There isn't an absolute reason. It's not straight forward to implement. And will be more buggy for a while. Also, there's rumors that carriers shut down the gateways if the traffic is too high. Come to think of it there are a couple of reasons. But it's definitely worth trying.