Hello. I've tested various configuration of 3CX, including Windows, iPhone, Android. I found tunnel mode a great feature and I'm really disappointed it was removed from 3CXPhone 3 for iPhone. I know, that everything can work even without tunnel, if you are in properly configured environment. BUT it is impossible to configure port forwarding, when my customers or employees are out of their office. They go to hotels, airports, offices of their partners, homes, etc. How, can I configure proper port forwarding in these locations? Maybe I'm missing something? Maybe it do works with tunnel? Please, advise what I should do with out of office users. Thank you.