BLA for all Shared Line compatible device

Shared Lines BLA feature is available to RingCentral MVP Ultimate and Premium accounts only with compatible device such as VVX310, VVX410, VVX500, VVX300, VVX400, VVX600, VVX301, VVX311, VVX411, VVX501, VVX601, VVX 350, VVX 450. it would be better if we can also cater all compatible shared line device to have the BLA function. Call can be put on / taken off hold on any phone.