What is a good free sip client for Iphone?

Actually 3сх is no longer supported, Zoiper does not work in the collapsed state. Are in search of. If you can tell me something normal.
October 3rd 19 at 01:37
3 answers
October 3rd 19 at 01:39
I used 3CxPhone
October 3rd 19 at 01:41
linphone view
October 3rd 19 at 01:43
thank you. now I understand how. a little krivolutsky, but if will work, it is not critical.

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