+2 votes

It might be a general problem with app permissions because CSipSimple has the same problem.

I can call up and reach my sim mailbox. Hear anything, keys are working fine and so I can control my mailbox.

But with any telefone on the other side: Nobody can hear me.

Any suggestions?

in Android by (140 points)

have the same problem, but have not yet found a resolution. A friend of mine rooted his phone and has no problems

1 Answer

0 votes

Try open firewalls ports  udp 10000-20000 of yours Internet router

by (220 points)
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