ios - Are iPhones on 3G connections "connectable?" Is 3g/wifi transparent when using sockets? -

i want know if can directly connect iphone on 3g connection using tcp socket, or if there nat problems.

in addition, sending data on socket transparent me programmer whether user using wifi or 3g?

yes, unless explicitly check, never know difference. however, it's practice either warn user or use less data if on cellular, because don't want eat of data.