Among the twenty service providers featured in this site, two has the most extensive and comprehensive customer support service. Aside from a toll free hotline, these companies have additional means for their customers to get the information they need.
Virtual PBX has standard customer support tools such as email and toll free number. However, in addition to those, it also has downloadable materials and online user guides available through its website.
The RingCentral website has an FAQs page as well as an online user guide. In addition, you can contact the RingCentral customer support service through its toll free number. You may also leave a message through an online form in the website.
For customer questions and concerns, you can call both Accudial and Grasshopper through their toll free numbers, or send them an email or a fax. They also have FAQs pages in their respective websites.