Twilio has announced that SIP Refer, a feature allowing call centers to transfer calls with context using Twilio and SIP infrastructure, is now generally available. This feature enables call centers to save money on their calls by removing Twilio from the call path, while maintaining call context. When used in conjunction with SIP UUI Headers, a feature released this summer, context can be passed along with the SIP Refer. Call centers can transfer calls from Twilio to their internal SIP infrastructure, handling sensitive information internally and maintaining call context. The feature is priced at $0.10 per refer and SIP UUI Header is free. This enables regulated industries to remove Twilio from the call path and handle sensitive information within their internal SIP infrastructure.