[Q] Voip + Server error topic

So I have an obi200 and have bought a key from freephoneline.

I have followed the settings and everything step-by-step from FPL's support page that shows the required settings

and to no avail I still get 'Server error. Please try again' whenever I try calling, it'll ring twice only. The settings has been approved in the call settings, if not, it'll say 'still trying'.

[Q] Echo problem for the person i am talking with while making voip call topic

Hi,
I am using LG G2 (D802 32 gb 4G) made in Korea and whenever i talk to people using different VoIP software, they complain about echo .. (they are listening their sound). When i called from these same software from my friends' phone there is no problem at all.. So, its only with my mobile. When i use ear phone its fine, no echo.. only it comes when i use without ear phone. And also i found two VoIP software without this issue . those works perfectly. but most VoIP have this issue, which works perfectly on other phones.. So, please someone tell me that why this problem and how to solve it ..... Thanks in advance...