issue with zoiper in iphone in oxo R9.2

[telementor]

hello,i have a problem in a oxo R9.2. i have vpn connection and i use zoiper as a sip phone.when i make account to iphone i can register,i can make calls to and from but they cannot hear me.i can hear them.
when i make account to android zoiper again everything works perfect.does anybody can help me?
thanks in advance

[tot3nkopf]

So there is no RTP stream (no voice). Check your network connection.

[telementor]

when i make setup the same account user to android mobile everything works good.

[tot3nkopf]

So there is no problem with OXO configuration or VPN.
Check your zoiper config.

[telementor]

i have the same configuration

[cavagnaro]

Check
Your
Network

[telementor]

thanks but the problem was the zoiper............i install with 6,00 euro bria sip phone and works perfect
thanks again