Ring 2 audio problems

We installed two Ring 2 doorbells this weekend. We are having the same issues on both. Video is great but sound is not. We hear the person at the doorbell fine (95% of the time) but it's very hard to hear the person indoors from the doorbell. At first we had horrible feedback. The person indoors would talk and it would continue to repeat. Customer service had us do many things including resetting. Now the volume is too low and it breaks up, sometimes on both ends, mostly from the person indoors. When we have customer service as a shared user, we can hear both ends fine. We added a friend as a shared user and we could hear him from the doorbell fine. It seems like it would be our phone but we don't know how to fix it. Also my phone works even worse than my husband's even though they were purchased it the same time, it's the same brand and all settings are the same. We have Samsung Galaxy 8 Pluses.