Question : Call Manager Express No Longer Forwarding Calls to Cell

Our SIP Trunk provider changed our SIP PBX and calls that used to be forwarded on demand to folks' cell phone no longer can. When you set the phone to forward and someone calls...the cell will ring but on answering no voice can be heard on either direction. Any thought as to what might have broken and how to fix. Some configuration snippets are below. Thanks.

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             voice service voip 
 no notify redirect ip2ip
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 no supplementary-service h450.2
 no supplementary-service h450.3
 supplementary-service h450.12
 no supplementary-service sip moved-temporarily
 no supplementary-service sip refer
 fax protocol pass-through g711ulaw
 h323
  call start slow
 sip
 
dial-peer voice 112 voip
 description **Incoming Call SIP Trunk**
 voice-class codec 1
 voice-class sip dtmf-relay force rtp-nte
 session protocol sipv2
 session target ipv4:192.168.8.85:5060
 incoming called-number 6505552...
 dtmf-relay rtp-nte
 no vad
 
dspfarm profile 1 transcode  
 codec g711ulaw
 codec g711alaw
 codec ilbc
 codec g723r63
 codec g723r53
 codec gsmamr-nb
 codec g729ar8
 codec g729abr8
 maximum sessions 2
 associate application SCCP

           
         

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Answer : Call Manager Express No Longer Forwarding Calls to Cell

In the end - the issue was resolved with changes at the SIP carrier. It was a slog to convince them the issue was on their end. They were cryptic about what they changed. I am looking for another provider. Any suggestion?