I upgraded a bunch of my Yealink T28's to firmware 188.8.131.52. I previously had 184.108.40.206 firmware. I guess it treats the BLF and transfers differently now? Before I had it set to type BLF; Value=extension (e.g. 2200); Extension=*20*2200. When you press that blf it would dial *20*22002200. For a quick fix I went in to a each phone and removed the extension after the *20* so it just has the extension in the "Value" and *20* in the "Extension". Backwards, but a quick fix! Do I need to change something elsewhere to get these phones to provision correctly?