** Your one-time purchase of the ooma Hub™ device means you won't owe monthly charges to ooma for unlimited calling in the US using the ooma system for at least three years. There may be calls, such as 411 calls, where there is an associated transactional service fee, in this case currently $0.99. ooma will provide a list of those numbers and the associated fees on its Web site. Extended functionality of the ooma Instant Second Line requires a one-time purchase of an ooma Scout™ device for $39.95. For further restrictions see ooma's Terms and Conditions on its Web site.