Hi
I am french and i will be coming to singapore soon.
I plan to use my own SIP number and sip provider to call/receive international.I will be using either a fixed phone (siemens c470 ip) that needs to be plugged into the router (or the box of the internet provider) or my iphone (i am using bria appli) either via wifi or 3g.
My questions:
1)do internet providers blocks SIP calls? is there any one for which we are sure sip calls are not blocked?
2)over 3g, are sip calls blocked?
Thanks for your help