LTE - 4G replace international calls

[Stu]

AT&T does actively block VoIP over 3G. It is not the best network in terms of performance but it works and is even contractually permitted.

[DRNewcomb]

Originally Posted by Stu

AT&T does actively block VoIP over 3G. It is not the best network in terms of performance but it works and is even contractually permitted.

I'll bet if one had a VPN tunnel, they'd find it a little hard to block. This is why they try to lock down their devices, like the iPhone, so you can't take advantage of work-arounds.