Euphoria is unfortunately a VoIP only provider, they don't do anything ISP related, which is probably why their system is rock solid as they only focus on VoIP and nothing else.
Their network is redundant as well, using three data centers in SA with redundant internet links as well. They had an outage on their main line a month or so ago and it automatically failed over onto the backup link, we didn't notice any downtime on our end.
Would give them a go, it's month to month and if you don't like the service you can cancel. There is a setup fee like with any decent VoIP provider, so just be aware of that.
Even if you just make use of their own Cudy router with LTE simcard you should be fine, the Vibe router is set up to compress the VoIP data so that even if the bandwidth is low the voice quality should not be affected, they also use a very specific voip codec which further improves data usage and voice quality.
Will send you contact details of our account manager via private message, feel free to email or phone him.
VoIP is an overlay technology that runs on underlying technologies like fiber, copper, wireless, etc. Unfortunately, your Internet is the most critical part of your VoIP solution. Many people try to achieve a converged solution without proper planning.
Argue this as much as you like: if you share voice with any other technology other than FTTB, you will have a dreadful experience in a business environment. With FFTH, it is possible to achieve good quality with some QoS, but then again, most people try to run business applications on home-grade equipment. If you are going to share voice and data, you need to ensure QoS at layer 2 and layer 3 on your own network. Otherwise, you can change and criticize VoIP providers all you like, but you will never have a good experience.
Freshphone is a Euphoria offering for home users with very stripped-down support, and rightfully so—it's cheap and easy, but it's for a home user. My personal view on Vibe technology is that it had its place with DSL, but not so much now with fiber, 4G, and 5G. It is simply a VPN with reduced packet size that theoretically should give you better calls, but without a dedicated link, i.e., a private leased line or MPLS solution, your traffic will still be routed by your ISP in the way that is most efficient for them, not you.
The best way to improve your voice quality is to ensure you have a provider with a good softswitch for calls. This is where VoIP provider redundancy is built. They don't have redundancy on your Internet links, and they can't—they're not an ISP. Some have redundancy to their uplink providers only.
Nine times out of ten, the cause of poor VoIP calls is due to clients having a badly set-up network using home or prosumer-grade equipment, sharing the Internet link, and lacking QoS on layer 2 or 3. No VoIP provider will be able to resolve your problems if you're planning convergence with business applications. I see this almost daily—same complaints, but clients do not want to fix their network to meet the correct standards for business. They understand how their home is set up and then build thier busienss networks themselves,this may be okay for email and browsing, but definitely not for voice. And now, with WiFi voice, they think it's magic. You always get what you pay for.