The biggest news is that starting tomorrow, April 5, VoLTE will be available to customers with supported phones. VoLTE is "Voice over LTE" and it's supposed to provide better voice quality. More importantly, VoLTE enables simultaneous voice and data making it possible to browse the web and use internet connected apps like Facebook and email while on a phone call. Boom has published a list of VoLTE capable Verizon phones on their site, along with instructions for enabling VoLTE.
A second bit of good news is that customers now see a summary of how many minutes, messages and MBs of data they have used when they visit their MyAccount OnLine Account Management portal. Until now customers had to call customer support to get the usage totals. Boom calls this new feature Boom! Monitor.
The third and final new feature is that hotspot and visual voicemail are now supported on Android devices. Hotspot and Visual Voicemail have been available to Boom customers with iPhones for some time but Android support is new. I believe that Android Visual Voicemail support will be limited to phones that came with either the Verizon or stock Android Visual Voicemail app installed.
There is no extra charge for using hotspot on Boom. Visual Voicemail iwill eventually cost $1.65/month or $9.99 per year for the basic version of Visual Voicemail. Customers who activate service with Boom before September 1, 2017 will get basic Visual Voicemail for free until January 1, 2019. New accounts activating after August 31, 2017 will be charged. After Jan 1, 2019 everyone will have to pay if they want Visual Voicemail. An "advanced" version of Visual Voicemail will also be available to Android users for $2.99 per month or $24.99 per year starting April 18, 2017.
Boom has always been notable for being the only Verizon MVNO to offer the Verizon Extended Network, which is what Verizon calls roaming, for both voice and data. Lately there has been a lot of discussion in the comments here and on HowardForums about roaming no longer being available on Boom. Multiple people have said that they have lost the ability to roam in areas where they used to be able to. Some who called Boom were told that roaming is no longer supported. I asked Jeff Holley, Boom President and co-founder about that and he told me that "Our coverage is on VZW's postpaid network with extended coverage. If that roam outside of that then service is not available. This footprint is bigger than the prepaid network that TracFone, Selectel and others use for service. I have not heard of anyone losing service yet because of a roaming issue."
You should be able to use the Verizon coverage map to check for coverage on Boom. If Jeff is correct and I have no reason to doubt him,voice service should be available everywhere that's displayed as either Digital Coverage (bright red) or Extended Digital Coverage (maroon) when you select Voice & Messaging. Data coverage should be available everywhere that's displayed as Verizon 4G LTE, Verizon 3G, Verizon 1X, Extended 3G or Extended 1X. Users with VoLTE capable phones will also be able to make VoLTE calls in areas shown in red when the 4G LTE Data Coverage option is selected on Verizon's map.
Updated 6-Apr-2017: Boom has clarified that there is no charge for horspot. An earlier version of this post had said that hotspot was bunded with Visual Voicemail as a paid service.
Source: Boom! Mobile