I have following setting on Asterisk server for paging voice message to multiple SIP extensions;
exten => 111,1,SIPAddHeader(Call-Info:<sip:>\;answer-after=0)
exten => 111,2,Page(SIP/152&SIP/153$SIP/154)
I am using Zoiper as SIP clients on Android phones. I have paid for premium feature. How setup the Zoiper SIP client to auto answer, when paging. At this time all the extensions are ringing but no auto answer.