HT813 User Agent Field


I have a customer that I need to add a customer SIP profile for, but when I add the customer name to the “Use SIP User-Agent Header:” field, it appends it to the end of the User-Agent instead of the front. For example “User-Agent: Grandstream HT813 testuseragent” instead of what I want “User-Agent: testuseragent Grandstream HT813”. I was able to do this without issue in a HT503, but for some reason am not able to in the ht8123 series. Has anyone run into thsi before?