You may want to change background of your Fanvil IP phone to a picture of your preference. This article will show you step by step on how to tailor a picture to your Fanvil IP phone’s display, and how to upload/upgrade the background image.
To troubleshoot or analyze an issue such as SIP registration failure, basic call issue of transfer, conference, forwarding etc., you may need to get a packet capture from your Fanvil IP phone. This article describes how to collect the capture.
Siam Global House Selected Fanvil IP Phones for Its VoIP Communication Solutions
When you encounter the IP Phone in Post Mode status, you can upgrade firmware through Post Mode to fix it. This is also another alternative for upgrading firmware besides of upgrading through the web page, USB flash drive and auto batch update.