[Ring] Can't connect to SIP/Ostel

[AHIB]

Hi Ring Team,

I tested Ring today and it seems like a great app with both P2P and SIP 
together. However I failed to log using my Ostel account when supplying the 
credentials in the SIP slot (Android version). The FAQ didn't say much about 
that either. If I understand correctly Ring can function as a SIP client just 
like cSIP and Linphone. So is that a bug or am I missing something?

Thanks.

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