You really have an "unlimited" plan now in the respect that your connection is not blocked when you exhaust your priority data but is merely throttled.
A true unlimited plan is not practical with a satellite connection due to the fact that the satellite itself (along with groundside Gateway facilities) have very real data throughput limits.
Satellites take years to design, built and launch and are very expensive and have relatively short lifespans ... about 15 years or so .. then require replacement. They can not be repaired or have their capacity expanded in the same manner that a ground based ISP could expand their network capacity.
No, currently we do not offer unlimited plans. The Liberty plans, if available in your area, are going to be your best bet. They offer our full speeds for a set amount of GB, 12, 24, 30, etc. After that, you have the Liberty Pass, which gives you up to 5 Mbps download speed until your billing cycle starts over.
For more info:
Send us your account info to ExedeListens@viasat.com, and we can take a look to see what plans are in your area that will suit you the best!
-- Exede Matt B