T22p Stuck on Initializing

Hi,

I have a brand new T22p that worked for about 2 days and then suddenly ended up stuck at initializing please wait. I have downloaded the How to upgrade Yealink phone on recovery mode package and followed instructions. It works fine in as much as the phone connects to the TFTP server and downloads the renamed firmware but it end with upgrade failed, error 11. I've tried this a few times and I keep getting this.

Any ideas? Not a great start to a new brand of phone we are trying.

Thanks,