Ok, thanks for the info, now I'm sure I can discard Fanvil H phones.
Regarding Yealink phones, there are: Yealink T2/T3/T4/T5, but the selection was pretty easy for me.
Yealink T4 and T5 phones go up the $100 budget, so I can discard them.
Yealink T3 are sure better than T2 ones, so I discard...